resource/aws_neptune_cluster: Support import and refactoring

[bflad]

Changes proposed in this pull request:

• Support resource import
• Refactor create/restore input logic to simplify
• Alphabetize d.Set() calls
• Ensure documentation page has -x to match sidebar

Output from acceptance testing:

9 tests passed (all tests)
=== RUN   TestAccAWSNeptuneCluster_updateTags
--- PASS: TestAccAWSNeptuneCluster_updateTags (113.70s)
=== RUN   TestAccAWSNeptuneCluster_kmsKey
--- PASS: TestAccAWSNeptuneCluster_kmsKey (117.63s)
=== RUN   TestAccAWSNeptuneCluster_basic
--- PASS: TestAccAWSNeptuneCluster_basic (118.67s)
=== RUN   TestAccAWSNeptuneCluster_namePrefix
--- PASS: TestAccAWSNeptuneCluster_namePrefix (119.00s)
=== RUN   TestAccAWSNeptuneCluster_encrypted
--- PASS: TestAccAWSNeptuneCluster_encrypted (119.10s)
=== RUN   TestAccAWSNeptuneCluster_iamAuth
--- PASS: TestAccAWSNeptuneCluster_iamAuth (138.85s)
=== RUN   TestAccAWSNeptuneCluster_backupsUpdate
--- PASS: TestAccAWSNeptuneCluster_backupsUpdate (163.50s)
=== RUN   TestAccAWSNeptuneCluster_takeFinalSnapshot
--- PASS: TestAccAWSNeptuneCluster_takeFinalSnapshot (169.30s)
=== RUN   TestAccAWSNeptuneCluster_updateIamRoles
--- PASS: TestAccAWSNeptuneCluster_updateIamRoles (184.62s)

[catsby]

👍

[bflad]

This has been released in version 1.30.0 of the AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!