fix when change ebs_volume type preserve iops

[leonardobiffi]

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Closes #20536

Output from acceptance testing:

$ make testacc TESTS=TestAccEC2EBSVolume_io1ToGp3 PKG=ec2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/ec2/... -v -count 1 -parallel 20 -run='TestAccEC2EBSVolume_io1ToGp3'  -timeout 180m
=== RUN   TestAccEC2EBSVolume_io1ToGp3
=== PAUSE TestAccEC2EBSVolume_io1ToGp3
=== CONT  TestAccEC2EBSVolume_io1ToGp3
--- PASS: TestAccEC2EBSVolume_io1ToGp3 (94.93s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/ec2        98.862s

$ make testacc TESTS=TestAccEC2EBSVolume_gp3ToGP2 PKG=ec2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/ec2/... -v -count 1 -parallel 20 -run='TestAccEC2EBSVolume_gp3ToGP2'  -timeout 180m
=== RUN   TestAccEC2EBSVolume_gp3ToGP2
=== PAUSE TestAccEC2EBSVolume_gp3ToGP2
=== CONT  TestAccEC2EBSVolume_gp3ToGP2
--- PASS: TestAccEC2EBSVolume_gp3ToGP2 (89.10s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/ec2        92.661s
...

[github-actions]

Welcome @leonardobiffi 👋

It looks like this is your first Pull Request submission to the Terraform AWS Provider! If you haven’t already done so please make sure you have checked out our CONTRIBUTING guide and FAQ to make sure your contribution is adhering to best practice and has all the necessary elements in place for a successful approval.

Also take a look at our FAQ which details how we prioritize Pull Requests for inclusion.

Thanks again, and welcome to the community! 😃

[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccEC2EBSVolume_' PKG=ec2 ACCTEST_PARALLELISM=2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/ec2/... -v -count 1 -parallel 2  -run=TestAccEC2EBSVolume_ -timeout 180m
=== RUN   TestAccEC2EBSVolume_basic
=== PAUSE TestAccEC2EBSVolume_basic
=== RUN   TestAccEC2EBSVolume_disappears
=== PAUSE TestAccEC2EBSVolume_disappears
=== RUN   TestAccEC2EBSVolume_updateAttachedEBSVolume
=== PAUSE TestAccEC2EBSVolume_updateAttachedEBSVolume
=== RUN   TestAccEC2EBSVolume_updateSize
=== PAUSE TestAccEC2EBSVolume_updateSize
=== RUN   TestAccEC2EBSVolume_updateType
=== PAUSE TestAccEC2EBSVolume_updateType
=== RUN   TestAccEC2EBSVolume_UpdateIops_io1
=== PAUSE TestAccEC2EBSVolume_UpdateIops_io1
=== RUN   TestAccEC2EBSVolume_UpdateIops_io2
=== PAUSE TestAccEC2EBSVolume_UpdateIops_io2
=== RUN   TestAccEC2EBSVolume_kmsKey
=== PAUSE TestAccEC2EBSVolume_kmsKey
=== RUN   TestAccEC2EBSVolume_noIops
=== PAUSE TestAccEC2EBSVolume_noIops
=== RUN   TestAccEC2EBSVolume_invalidIopsForType
=== PAUSE TestAccEC2EBSVolume_invalidIopsForType
=== RUN   TestAccEC2EBSVolume_invalidThroughputForType
=== PAUSE TestAccEC2EBSVolume_invalidThroughputForType
=== RUN   TestAccEC2EBSVolume_withTags
=== PAUSE TestAccEC2EBSVolume_withTags
=== RUN   TestAccEC2EBSVolume_multiAttach_io1
=== PAUSE TestAccEC2EBSVolume_multiAttach_io1
=== RUN   TestAccEC2EBSVolume_multiAttach_io2
=== PAUSE TestAccEC2EBSVolume_multiAttach_io2
=== RUN   TestAccEC2EBSVolume_multiAttach_gp2
=== PAUSE TestAccEC2EBSVolume_multiAttach_gp2
=== RUN   TestAccEC2EBSVolume_outpost
=== PAUSE TestAccEC2EBSVolume_outpost
=== RUN   TestAccEC2EBSVolume_GP3_basic
=== PAUSE TestAccEC2EBSVolume_GP3_basic
=== RUN   TestAccEC2EBSVolume_GP3_iops
=== PAUSE TestAccEC2EBSVolume_GP3_iops
=== RUN   TestAccEC2EBSVolume_GP3_throughput
=== PAUSE TestAccEC2EBSVolume_GP3_throughput
=== RUN   TestAccEC2EBSVolume_gp3ToGP2
=== PAUSE TestAccEC2EBSVolume_gp3ToGP2
=== RUN   TestAccEC2EBSVolume_io1ToGP3
=== PAUSE TestAccEC2EBSVolume_io1ToGP3
=== RUN   TestAccEC2EBSVolume_snapshotID
=== PAUSE TestAccEC2EBSVolume_snapshotID
=== RUN   TestAccEC2EBSVolume_snapshotIDAndSize
=== PAUSE TestAccEC2EBSVolume_snapshotIDAndSize
=== CONT  TestAccEC2EBSVolume_basic
=== CONT  TestAccEC2EBSVolume_multiAttach_io1
--- PASS: TestAccEC2EBSVolume_basic (51.29s)
=== CONT  TestAccEC2EBSVolume_UpdateIops_io2
--- PASS: TestAccEC2EBSVolume_multiAttach_io1 (51.85s)
=== CONT  TestAccEC2EBSVolume_withTags
--- PASS: TestAccEC2EBSVolume_UpdateIops_io2 (77.48s)
=== CONT  TestAccEC2EBSVolume_invalidThroughputForType
--- PASS: TestAccEC2EBSVolume_invalidThroughputForType (4.14s)
=== CONT  TestAccEC2EBSVolume_invalidIopsForType
--- PASS: TestAccEC2EBSVolume_withTags (85.92s)
=== CONT  TestAccEC2EBSVolume_noIops
--- PASS: TestAccEC2EBSVolume_invalidIopsForType (5.13s)
=== CONT  TestAccEC2EBSVolume_kmsKey
--- PASS: TestAccEC2EBSVolume_noIops (49.90s)
=== CONT  TestAccEC2EBSVolume_updateSize
--- PASS: TestAccEC2EBSVolume_kmsKey (53.47s)
=== CONT  TestAccEC2EBSVolume_UpdateIops_io1
--- PASS: TestAccEC2EBSVolume_updateSize (92.36s)
=== CONT  TestAccEC2EBSVolume_updateType
--- PASS: TestAccEC2EBSVolume_UpdateIops_io1 (94.18s)
=== CONT  TestAccEC2EBSVolume_GP3_throughput
--- PASS: TestAccEC2EBSVolume_updateType (87.38s)
=== CONT  TestAccEC2EBSVolume_snapshotIDAndSize
--- PASS: TestAccEC2EBSVolume_GP3_throughput (86.09s)
=== CONT  TestAccEC2EBSVolume_snapshotID
--- PASS: TestAccEC2EBSVolume_snapshotIDAndSize (95.46s)
=== CONT  TestAccEC2EBSVolume_io1ToGP3
--- PASS: TestAccEC2EBSVolume_snapshotID (94.64s)
=== CONT  TestAccEC2EBSVolume_gp3ToGP2
--- PASS: TestAccEC2EBSVolume_io1ToGP3 (82.73s)
=== CONT  TestAccEC2EBSVolume_multiAttach_gp2
--- PASS: TestAccEC2EBSVolume_multiAttach_gp2 (4.78s)
=== CONT  TestAccEC2EBSVolume_updateAttachedEBSVolume
--- PASS: TestAccEC2EBSVolume_gp3ToGP2 (88.69s)
=== CONT  TestAccEC2EBSVolume_GP3_iops
--- PASS: TestAccEC2EBSVolume_GP3_iops (86.75s)
=== CONT  TestAccEC2EBSVolume_multiAttach_io2
--- PASS: TestAccEC2EBSVolume_multiAttach_io2 (49.52s)
=== CONT  TestAccEC2EBSVolume_outpost
    acctest.go:1308: skipping since no Outposts found
--- SKIP: TestAccEC2EBSVolume_outpost (0.59s)
=== CONT  TestAccEC2EBSVolume_GP3_basic
--- PASS: TestAccEC2EBSVolume_GP3_basic (50.34s)
=== CONT  TestAccEC2EBSVolume_disappears
--- PASS: TestAccEC2EBSVolume_updateAttachedEBSVolume (232.40s)
--- PASS: TestAccEC2EBSVolume_disappears (42.51s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/ec2	798.877s

[ewbankkit]

@leonardobiffi Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v4.17.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.