data source azurerm_app_configuration_keys - fix to use LinkWorkaroundDataPlaneClientWithEndpoint

[teowa]

resolves #21206

--- PASS: TestAccAppConfigurationKeysDataSource_key (104.59s)
--- PASS: TestAccAppConfigurationKeyDataSource_basic (104.82s)
--- PASS: TestAccAppConfigurationKeyDataSource_basicNoLabel (105.55s)
--- PASS: TestAccAppConfigurationKeysDataSource_allkeys (107.31s)
--- PASS: TestAccAppConfigurationKey_basicNoLabel_afterLabel (107.33s)
--- PASS: TestAccAppConfigurationKey_basic (108.76s)
--- PASS: TestAccAppConfigurationKey_slash (109.53s)
--- PASS: TestAccAppConfigurationKey_complicatedKeyLabel (109.86s)
--- PASS: TestAccAppConfigurationKey_basicNoLabel (109.91s)
--- PASS: TestAccAppConfigurationKey_requiresImport (111.50s)
--- PASS: TestAccAppConfigurationKey_lockUpdate (121.19s)
--- PASS: TestAccAppConfigurationKeysDataSource_label (167.13s)
--- PASS: TestAccAppConfigurationKeyDataSource_basicVault (255.46s)
--- PASS: TestAccAppConfigurationKey_basicVault (257.31s)
--- PASS: TestAccAppConfigurationKey_KVToVault (314.16s)
PASS
ok      github.com/hashicorp/terraform-provider-azurerm/internal/services/appconfiguration      315.387s

[tombuildsstuff]

LGTM - thanks for this @teowa

[github-actions]

This functionality has been released in v3.51.0 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!