Fix lightsail bucket resource access partition pre-check

[jar-b]

Description

Fixing linter finding introduced when #29460 was merged with main.

Relations

Relates #29460

Output from Acceptance Testing

$ make testacc TESTARGS='-run=TestAccLightsailBucketResourceAccess' PKG=lightsail
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/lightsail/... -v -count 1 -parallel 20  -run=TestAccLightsailBucketResourceAccess -timeout 180m
=== RUN   TestAccLightsailBucketResourceAccess_basic
=== PAUSE TestAccLightsailBucketResourceAccess_basic
=== RUN   TestAccLightsailBucketResourceAccess_disappears
=== PAUSE TestAccLightsailBucketResourceAccess_disappears
=== CONT  TestAccLightsailBucketResourceAccess_basic
=== CONT  TestAccLightsailBucketResourceAccess_disappears
--- PASS: TestAccLightsailBucketResourceAccess_disappears (63.62s)
--- PASS: TestAccLightsailBucketResourceAccess_basic (66.16s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/lightsail  69.228s

[github-actions]

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[github-actions]

This functionality has been released in v4.57.0 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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