azurerm_data_factory_integration_runtime_azure_ssis - support Elastic Pool

[ziyeqf]

fix #18079

test

TF_ACC=1 go test -v ./internal/services/datafactory -run=TestAccDataFactoryIntegrationRuntimeManagedSsis_basic 
=== RUN   TestAccDataFactoryIntegrationRuntimeManagedSsis_basic
=== PAUSE TestAccDataFactoryIntegrationRuntimeManagedSsis_basic
=== CONT  TestAccDataFactoryIntegrationRuntimeManagedSsis_basic
--- PASS: TestAccDataFactoryIntegrationRuntimeManagedSsis_basic (255.56s)
PASS
ok      github.com/hashicorp/terraform-provider-azurerm/internal/services/datafactory   256.664s

TF_ACC=1 go test -v ./internal/services/datafactory -run=TestAccDataFactoryIntegrationRuntimeManagedSsis_withElasticPool    
=== RUN   TestAccDataFactoryIntegrationRuntimeManagedSsis_withElasticPool
=== PAUSE TestAccDataFactoryIntegrationRuntimeManagedSsis_withElasticPool
=== CONT  TestAccDataFactoryIntegrationRuntimeManagedSsis_withElasticPool
--- PASS: TestAccDataFactoryIntegrationRuntimeManagedSsis_withElasticPool (423.17s)
PASS
ok      github.com/hashicorp/terraform-provider-azurerm/internal/services/datafactory   424.286s

[magodo]

Thanks for this PR!
I've taken a look through and left some comments inline, but this is mostly looking good to me 👍

[katbyte]

LGTM 🏷️

[github-actions]

This functionality has been released in v3.27.0 of the Terraform 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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