[Bug]: aws_vpn_connection removes transit gateway id dependency for IPv6 tunnel options

[tmatty102]

Description

Fixes the requirement of transit gateway id when creating IPv6 VPN connection and accelerator. VPN tunnel with ipv6 options should be allowed to created without transit gateway. Such tunnel can attach to core-network, CloudWAN.

Relations

Closes #36075

References

Output from Acceptance Testing

❯ make testacc TESTS=TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR PKG=ec2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.21.8 test ./internal/service/ec2/... -v -count 1 -parallel 20 -run='TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR'  -timeout 360m
=== RUN   TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR
=== PAUSE TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR
=== CONT  TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR
--- PASS: TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR (43.60s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/ec2	48.933s

[github-actions]

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[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR\|TestAccSiteVPNConnection_basic' PKG=ec2      
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.21.8 test ./internal/service/ec2/... -v -count 1 -parallel 20  -run=TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR\|TestAccSiteVPNConnection_basic -timeout 360m
=== RUN   TestAccSiteVPNConnection_basic
=== PAUSE TestAccSiteVPNConnection_basic
=== RUN   TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR
=== PAUSE TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR
=== CONT  TestAccSiteVPNConnection_basic
=== CONT  TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR
--- PASS: TestAccSiteVPNConnection_tunnel1InsideIPv6CIDR (54.99s)
--- PASS: TestAccSiteVPNConnection_basic (242.31s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/ec2	254.882s

[ewbankkit]

@tmatty102 Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v5.42.0 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.