The existing enrich policy resource and data source are based on the legacy TF SDKv2. We want to migrate both the resource and data source to the Terraform Plugin Framework.

• You'll need to focus on the files in internal/elasticsearch/enrich
• Make sure to structure the new plugin framework based codebase consistent with the system user resource in internal/elasticsearch/security/system_user
• Make sure to copy the existing acceptance tests into the new codebase
• Make sure the existing tests pass
• Add an acceptance test verifying that a legacy resource is correctly handled by the new plugin framework resource. Look at the TestAccResourceSecuritySystemUserFromSDK test in internal/elasticsearch/system_user/acc_test.go as an example of how to do this.
• Add an entry to CHANGELOG.md referencing the created PR
• The existing data source uses the read functionality of the resource. Maintain this level of code re-use.