r/sfn_state_machine: prevent panic when accessing the tracing or logging config of the state machine after update

[anGie44]

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Closes #22517

Output from acceptance testing:

--- PASS: TestAccSFNStateMachine_tracing (84.84s)
--- PASS: TestAccSFNStateMachine_createUpdate (89.72s)
--- PASS: TestAccSFNStateMachine_expressUpdate (90.68s)
--- PASS: TestAccSFNStateMachine_tags (90.87s)
--- PASS: TestAccSFNStateMachine_expressLogging (92.57s)
--- PASS: TestAccSFNStateMachine_disappears (94.73s)
--- PASS: TestAccSFNStateMachine_standardUpdate (149.46s)

[ewbankkit]

LGTM 🚀.

% make testacc TESTS=TestAccSFNStateMachine_ PKG=sfn ACCTEST_PARALLELISM=3
==> Checking that code complies with gofmt requirements...
^[[ATF_ACC=1 go test ./internal/service/sfn/... -v -count 1 -parallel 3 -run='TestAccSFNStateMachine_'  -timeout 180m
=== RUN   TestAccSFNStateMachine_createUpdate
=== PAUSE TestAccSFNStateMachine_createUpdate
=== RUN   TestAccSFNStateMachine_expressUpdate
=== PAUSE TestAccSFNStateMachine_expressUpdate
=== RUN   TestAccSFNStateMachine_standardUpdate
=== PAUSE TestAccSFNStateMachine_standardUpdate
=== RUN   TestAccSFNStateMachine_tags
=== PAUSE TestAccSFNStateMachine_tags
=== RUN   TestAccSFNStateMachine_tracing
=== PAUSE TestAccSFNStateMachine_tracing
=== RUN   TestAccSFNStateMachine_disappears
=== PAUSE TestAccSFNStateMachine_disappears
=== RUN   TestAccSFNStateMachine_expressLogging
=== PAUSE TestAccSFNStateMachine_expressLogging
=== CONT  TestAccSFNStateMachine_createUpdate
=== CONT  TestAccSFNStateMachine_expressLogging
=== CONT  TestAccSFNStateMachine_tags
--- PASS: TestAccSFNStateMachine_createUpdate (91.34s)
=== CONT  TestAccSFNStateMachine_tracing
--- PASS: TestAccSFNStateMachine_tags (92.18s)
=== CONT  TestAccSFNStateMachine_standardUpdate
--- PASS: TestAccSFNStateMachine_expressLogging (94.79s)
=== CONT  TestAccSFNStateMachine_expressUpdate
--- PASS: TestAccSFNStateMachine_tracing (58.29s)
=== CONT  TestAccSFNStateMachine_disappears
--- PASS: TestAccSFNStateMachine_standardUpdate (58.46s)
--- PASS: TestAccSFNStateMachine_expressUpdate (121.11s)
--- PASS: TestAccSFNStateMachine_disappears (71.92s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/sfn	225.110s

[github-actions]

This functionality has been released in v4.11.0 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]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.