fix: Set grant_token as sensitive for aws_kms_grant

[acwwat]

Description

This PR is to set the grant token as sensitive in the aws_kms_grant resource for a bit more security.

Relations

Closes #36450

References

n/a

Output from Acceptance Testing

$ make testacc TESTS=TestAccKMSGrant_ PKG=kms
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.22.2 test ./internal/service/kms/... -v -count 1 -parallel 20 -run='TestAccKMSGrant_'  -timeout 360m
=== RUN   TestAccKMSGrant_basic
=== PAUSE TestAccKMSGrant_basic
=== RUN   TestAccKMSGrant_withConstraints
=== PAUSE TestAccKMSGrant_withConstraints
=== RUN   TestAccKMSGrant_withRetiringPrincipal
=== PAUSE TestAccKMSGrant_withRetiringPrincipal
=== RUN   TestAccKMSGrant_bare
=== PAUSE TestAccKMSGrant_bare
=== RUN   TestAccKMSGrant_arn
=== PAUSE TestAccKMSGrant_arn
=== RUN   TestAccKMSGrant_asymmetricKey
=== PAUSE TestAccKMSGrant_asymmetricKey
=== RUN   TestAccKMSGrant_disappears
=== PAUSE TestAccKMSGrant_disappears
=== RUN   TestAccKMSGrant_crossAccountARN
=== PAUSE TestAccKMSGrant_crossAccountARN
=== RUN   TestAccKMSGrant_service
=== PAUSE TestAccKMSGrant_service
=== CONT  TestAccKMSGrant_basic
=== CONT  TestAccKMSGrant_asymmetricKey
=== CONT  TestAccKMSGrant_bare
=== CONT  TestAccKMSGrant_withRetiringPrincipal
=== CONT  TestAccKMSGrant_withConstraints
=== CONT  TestAccKMSGrant_arn
=== CONT  TestAccKMSGrant_disappears
=== CONT  TestAccKMSGrant_service
=== CONT  TestAccKMSGrant_crossAccountARN
    grant_test.go:252: skipping test because at least one environment variable of [AWS_ALTERNATE_PROFILE AWS_ALTERNATE_ACCESS_KEY_ID] must be set. Usage: credentials for running acceptance testing in alternate AWS account.
--- SKIP: TestAccKMSGrant_crossAccountARN (0.93s)
--- PASS: TestAccKMSGrant_service (21.64s)
--- PASS: TestAccKMSGrant_withRetiringPrincipal (33.66s)
--- PASS: TestAccKMSGrant_bare (33.67s)
--- PASS: TestAccKMSGrant_arn (33.69s)
--- PASS: TestAccKMSGrant_basic (33.70s)
--- PASS: TestAccKMSGrant_asymmetricKey (33.77s)
--- PASS: TestAccKMSGrant_withConstraints (43.57s)
--- PASS: TestAccKMSGrant_disappears (208.78s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/kms        208.980s

[github-actions]

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[ewbankkit]

LGTM 🚀.

[ewbankkit]

@acwwat Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v5.51.0 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!