Fix TestAccDataformRepositoryReleaseConfig_dataformRepositoryReleaseC

[modular-magician]

fixes two tests TestAccDataformRepositoryReleaseConfig_dataformRepositoryReleaseConfigExample

test error

        Error: Error creating Secret: googleapi: Error 409: Secret [projects/****/secrets/secret] already exists.
          with google_secret_manager_secret.secret,
          on terraform_plugin_test.tf line 7, in resource "google_secret_manager_secret" "secret":
           7: resource "google_secret_manager_secret" "secret" {

Release Note Template for Downstream PRs (will be copied)

Derived from GoogleCloudPlatform/magic-modules#8764

[github-actions]

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