(MODULES-11462): Implement finish method for class tag inheritance in Puppet::ResourceApi in 1.9.0 branch

[span786]

Summary

Implement the finish method for class tag inheritance within Puppet::ResourceApi.
This method is being overridden to allow reinjection of default tags (such as the class name) back into the Puppet catalog during compilation.

Additional Context

• The Puppet::ResourceApi currently does not handle metaparams like tags effectively.
• To handle default tags, we needed a point in the catalog-building process where they could be reintroduced. Overriding the finish method provides that opportunity, enabling us to push the tags back into the catalog at the right stage.

Related Issues (if any)

Due to this limitation, modules such as puppetlabs-firewall (version 8.0.0 and later) fail to recognize default tags like the class name. As a result, running puppet apply <manifest.pp> --tags <classname> does nothing because the expected tags are missing.

Checklist

• 🟢 Spec tests.
• 🟢 Acceptance tests.
• Manually verified.

[span786]

The puppet-resource_api gem version 2.0.0 is currently unstable, so 1.9.0 has been tagged for puppet-agent releases.
This PR targets the 1.9.0 tag to allow us to release version 1.9.1 with the changes introduced here, ensuring no breaking changes are included in the puppet-agent release.