r/iam_role_policy: add plan time validation to role argument

[anGie44]

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Closes #26081

Output from acceptance testing:

$ make testacc TESTARGS='-run=TestAccIAMRolePolicy_' PKG=iam
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/iam/... -v -count 1 -parallel 20  -run=TestAccIAMRolePolicy_ -timeout 180m
=== RUN   TestAccIAMRolePolicy_basic
=== PAUSE TestAccIAMRolePolicy_basic
=== RUN   TestAccIAMRolePolicy_disappears
=== PAUSE TestAccIAMRolePolicy_disappears
=== RUN   TestAccIAMRolePolicy_policyOrder
=== PAUSE TestAccIAMRolePolicy_policyOrder
=== RUN   TestAccIAMRolePolicy_namePrefix
=== PAUSE TestAccIAMRolePolicy_namePrefix
=== RUN   TestAccIAMRolePolicy_generatedName
=== PAUSE TestAccIAMRolePolicy_generatedName
=== RUN   TestAccIAMRolePolicy_invalidJSON
=== PAUSE TestAccIAMRolePolicy_invalidJSON
=== RUN   TestAccIAMRolePolicy_Policy_invalidResource
=== PAUSE TestAccIAMRolePolicy_Policy_invalidResource
=== CONT  TestAccIAMRolePolicy_basic
=== CONT  TestAccIAMRolePolicy_generatedName
=== CONT  TestAccIAMRolePolicy_namePrefix
=== CONT  TestAccIAMRolePolicy_disappears
=== CONT  TestAccIAMRolePolicy_invalidJSON
=== CONT  TestAccIAMRolePolicy_policyOrder
=== CONT  TestAccIAMRolePolicy_Policy_invalidResource
--- PASS: TestAccIAMRolePolicy_invalidJSON (3.40s)
--- PASS: TestAccIAMRolePolicy_Policy_invalidResource (10.97s)
--- PASS: TestAccIAMRolePolicy_disappears (17.68s)
--- PASS: TestAccIAMRolePolicy_policyOrder (25.71s)
--- PASS: TestAccIAMRolePolicy_namePrefix (31.85s)
--- PASS: TestAccIAMRolePolicy_generatedName (31.90s)
--- PASS: TestAccIAMRolePolicy_basic (31.94s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/iam	35.626s

[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccIAMRolePolicy_' PKG=iam ACCTEST_PARALLELISM=3
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/iam/... -v -count 1 -parallel 3  -run=TestAccIAMRolePolicy_ -timeout 180m
=== RUN   TestAccIAMRolePolicy_basic
=== PAUSE TestAccIAMRolePolicy_basic
=== RUN   TestAccIAMRolePolicy_disappears
=== PAUSE TestAccIAMRolePolicy_disappears
=== RUN   TestAccIAMRolePolicy_policyOrder
=== PAUSE TestAccIAMRolePolicy_policyOrder
=== RUN   TestAccIAMRolePolicy_namePrefix
=== PAUSE TestAccIAMRolePolicy_namePrefix
=== RUN   TestAccIAMRolePolicy_generatedName
=== PAUSE TestAccIAMRolePolicy_generatedName
=== RUN   TestAccIAMRolePolicy_invalidJSON
=== PAUSE TestAccIAMRolePolicy_invalidJSON
=== RUN   TestAccIAMRolePolicy_Policy_invalidResource
=== PAUSE TestAccIAMRolePolicy_Policy_invalidResource
=== CONT  TestAccIAMRolePolicy_basic
=== CONT  TestAccIAMRolePolicy_generatedName
=== CONT  TestAccIAMRolePolicy_policyOrder
--- PASS: TestAccIAMRolePolicy_policyOrder (33.08s)
=== CONT  TestAccIAMRolePolicy_namePrefix
--- PASS: TestAccIAMRolePolicy_basic (41.99s)
=== CONT  TestAccIAMRolePolicy_disappears
--- PASS: TestAccIAMRolePolicy_generatedName (42.08s)
=== CONT  TestAccIAMRolePolicy_invalidJSON
--- PASS: TestAccIAMRolePolicy_invalidJSON (1.82s)
=== CONT  TestAccIAMRolePolicy_Policy_invalidResource
--- PASS: TestAccIAMRolePolicy_Policy_invalidResource (11.44s)
--- PASS: TestAccIAMRolePolicy_disappears (19.29s)
--- PASS: TestAccIAMRolePolicy_namePrefix (38.02s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/iam	81.339s

[ewbankkit]

@anGie44 Thanks for the contribution 🎉 👏.

[anGie44]

thanks for the review @ewbankkit !...and fixing the linting error 😅

[github-actions]

This functionality has been released in v4.25.0 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]

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