glacier/vault: Improve policy diffs

[YakDriver]

Description

Relations

Relates #23288

References

Output from Acceptance Testing

% make testacc TESTS="TestAccGlacierVault_|TestAccGlacierVaultLock_" PKG=glacier
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/glacier/... -v -count 1 -parallel 20 -run='TestAccGlacierVault_|TestAccGlacierVaultLock_'  -timeout 180m
=== RUN   TestAccGlacierVaultLock_basic
=== PAUSE TestAccGlacierVaultLock_basic
=== RUN   TestAccGlacierVaultLock_completeLock
=== PAUSE TestAccGlacierVaultLock_completeLock
=== RUN   TestAccGlacierVaultLock_ignoreEquivalentPolicy
=== PAUSE TestAccGlacierVaultLock_ignoreEquivalentPolicy
=== RUN   TestAccGlacierVault_basic
=== PAUSE TestAccGlacierVault_basic
=== RUN   TestAccGlacierVault_notification
=== PAUSE TestAccGlacierVault_notification
=== RUN   TestAccGlacierVault_policy
=== PAUSE TestAccGlacierVault_policy
=== RUN   TestAccGlacierVault_tags
=== PAUSE TestAccGlacierVault_tags
=== RUN   TestAccGlacierVault_disappears
=== PAUSE TestAccGlacierVault_disappears
=== RUN   TestAccGlacierVault_ignoreEquivalent
=== PAUSE TestAccGlacierVault_ignoreEquivalent
=== CONT  TestAccGlacierVaultLock_basic
=== CONT  TestAccGlacierVault_policy
=== CONT  TestAccGlacierVault_disappears
=== CONT  TestAccGlacierVault_tags
=== CONT  TestAccGlacierVault_basic
=== CONT  TestAccGlacierVaultLock_ignoreEquivalentPolicy
=== CONT  TestAccGlacierVaultLock_completeLock
=== CONT  TestAccGlacierVault_ignoreEquivalent
=== CONT  TestAccGlacierVault_notification
--- PASS: TestAccGlacierVault_disappears (18.78s)
--- PASS: TestAccGlacierVault_basic (26.39s)
--- PASS: TestAccGlacierVaultLock_basic (28.04s)
--- PASS: TestAccGlacierVaultLock_completeLock (28.12s)
--- PASS: TestAccGlacierVault_ignoreEquivalent (33.13s)
--- PASS: TestAccGlacierVaultLock_ignoreEquivalentPolicy (33.24s)
--- PASS: TestAccGlacierVault_tags (52.38s)
--- PASS: TestAccGlacierVault_policy (53.54s)
--- PASS: TestAccGlacierVault_notification (56.61s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/glacier	60.450s

[github-actions]

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[github-actions]

This functionality has been released in v4.50.0 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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