[Bug fix] run_configuration not part of update request resulting in default values

[neelrs]

Description

AWS Managed Flink application allows mechanism to configure the runtime configuration that part of run_configuration attribute.
During the UpdateApplication workflow, if there is no change in the run_configuration the values are not passed with the Update request. This results in AWS setting them to default value.

Applications fail to start after updates when run_configuration.flink_run_configuration.allow_non_restored_state is defined as true. As this parameter isn't being properly preserved, the AWS default value is false, causing applications that require this setting to fail during update.

Output from Acceptance Testing

New acceptance test added TestAccKinesisAnalyticsV2Application_FlinkApplication_updateRestorable for verifying the run_configuration across updates.

% make testacc TESTS=TestAccKinesisAnalyticsV2Application_FlinkApplication_updateRestorable PKG=kinesisanalyticsv2

make: Verifying source code with gofmt...
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/kinesisanalyticsv2/... -v -count 1 -parallel 20 -run='TestAccKinesisAnalyticsV2Application_FlinkApplication_updateRestorable'  -timeout 360m -vet=off
2025/04/26 16:42:51 Initializing Terraform AWS Provider...
=== RUN   TestAccKinesisAnalyticsV2Application_FlinkApplication_updateRestorable
=== PAUSE TestAccKinesisAnalyticsV2Application_FlinkApplication_updateRestorable
=== CONT  TestAccKinesisAnalyticsV2Application_FlinkApplication_updateRestorable
--- PASS: TestAccKinesisAnalyticsV2Application_FlinkApplication_updateRestorable (435.83s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/kinesisanalyticsv2 440.385s


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[github-actions]

✅ Thank you for correcting the previously detected issues! The maintainers appreciate your efforts to make the review process as smooth as possible.

[github-actions]

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