Initialize start time and end time value avoid null override

[yaput]

Description

Initialize StartTime and EndTime for aws scheduled action parameter from current existing values.

Relations

Closes #33708
Closes #32616

References

Output from Acceptance Testing

% make testacc TESTS=TestAccAppAutoScalingScheduledAction_UpdateScheduleRetainStartAndEndTime_ecs PKG=appautoscaling
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/appautoscaling/... -v -count 1 -parallel 20 -run='TestAccAppAutoScalingScheduledAction_UpdateScheduleRetainStartAndEndTime_ecs'  -timeout 360m
=== RUN   TestAccAppAutoScalingScheduledAction_UpdateScheduleRetainStartAndEndTime_ecs
=== PAUSE TestAccAppAutoScalingScheduledAction_UpdateScheduleRetainStartAndEndTime_ecs
=== CONT  TestAccAppAutoScalingScheduledAction_UpdateScheduleRetainStartAndEndTime_ecs
--- PASS: TestAccAppAutoScalingScheduledAction_UpdateScheduleRetainStartAndEndTime_ecs (93.85s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/appautoscaling	95.967s
% make testacc TESTS=TestAccAppAutoScalingScheduledAction_UpdateStartAndEndTime_ecs PKG=appautoscaling
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/appautoscaling/... -v -count 1 -parallel 20 -run='TestAccAppAutoScalingScheduledAction_UpdateStartAndEndTime_ecs'  -timeout 360m
=== RUN   TestAccAppAutoScalingScheduledAction_UpdateStartAndEndTime_ecs
=== PAUSE TestAccAppAutoScalingScheduledAction_UpdateStartAndEndTime_ecs
=== CONT  TestAccAppAutoScalingScheduledAction_UpdateStartAndEndTime_ecs
--- PASS: TestAccAppAutoScalingScheduledAction_UpdateStartAndEndTime_ecs (88.49s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/appautoscaling	90.601s
%  make testacc TESTS=TestAccAppAutoScalingScheduledAction_AddStartTimeAndEndTimeAfterResourceCreated_ecs PKG=appautoscaling
TF_ACC=1 go test ./internal/service/appautoscaling/... -v -count 1 -parallel 20 -run='TestAccAppAutoScalingScheduledAction_AddStartTimeAndEndTimeAfterResourceCreated_ecs'  -timeout 360m
=== RUN   TestAccAppAutoScalingScheduledAction_AddStartTimeAndEndTimeAfterResourceCreated_ecs
=== PAUSE TestAccAppAutoScalingScheduledAction_AddStartTimeAndEndTimeAfterResourceCreated_ecs
=== CONT  TestAccAppAutoScalingScheduledAction_AddStartTimeAndEndTimeAfterResourceCreated_ecs
--- PASS: TestAccAppAutoScalingScheduledAction_AddStartTimeAndEndTimeAfterResourceCreated_ecs (73.79s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/appautoscaling	75.917s

[github-actions]

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[github-actions]

Welcome @yaput 👋

It looks like this is your first Pull Request submission to the Terraform AWS Provider! If you haven’t already done so please make sure you have checked out our CONTRIBUTOR guide and FAQ to make sure your contribution is adhering to best practice and has all the necessary elements in place for a successful approval.

Also take a look at our FAQ which details how we prioritize Pull Requests for inclusion.

Thanks again, and welcome to the community! 😃

[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccAppAutoScalingScheduledAction_ecs' PKG=appautoscaling ACCTEST_PARALLELISM=3      
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go1.21.8 test ./internal/service/appautoscaling/... -v -count 1 -parallel 3  -run=TestAccAppAutoScalingScheduledAction_ecs -timeout 360m
=== RUN   TestAccAppAutoScalingScheduledAction_ecs
=== PAUSE TestAccAppAutoScalingScheduledAction_ecs
=== RUN   TestAccAppAutoScalingScheduledAction_ecsUpdateScheduleRetainStartAndEndTime
=== PAUSE TestAccAppAutoScalingScheduledAction_ecsUpdateScheduleRetainStartAndEndTime
=== RUN   TestAccAppAutoScalingScheduledAction_ecsUpdateStartAndEndTime
=== PAUSE TestAccAppAutoScalingScheduledAction_ecsUpdateStartAndEndTime
=== RUN   TestAccAppAutoScalingScheduledAction_ecsAddStartTimeAndEndTimeAfterResourceCreated
=== PAUSE TestAccAppAutoScalingScheduledAction_ecsAddStartTimeAndEndTimeAfterResourceCreated
=== CONT  TestAccAppAutoScalingScheduledAction_ecs
=== CONT  TestAccAppAutoScalingScheduledAction_ecsUpdateStartAndEndTime
=== CONT  TestAccAppAutoScalingScheduledAction_ecsAddStartTimeAndEndTimeAfterResourceCreated
--- PASS: TestAccAppAutoScalingScheduledAction_ecs (81.16s)
=== CONT  TestAccAppAutoScalingScheduledAction_ecsUpdateScheduleRetainStartAndEndTime
--- PASS: TestAccAppAutoScalingScheduledAction_ecsAddStartTimeAndEndTimeAfterResourceCreated (85.24s)
--- PASS: TestAccAppAutoScalingScheduledAction_ecsUpdateStartAndEndTime (85.34s)
--- PASS: TestAccAppAutoScalingScheduledAction_ecsUpdateScheduleRetainStartAndEndTime (79.32s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/appautoscaling	166.985s

[ewbankkit]

@yaput Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v5.42.0 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.