Use licensee methods

What does this MR do?

Part of https://gitlab.com/gitlab-org/gitlab/-/issues/325541

Depends on !57382 (merged) base branch needs to be changed to master after dependency was merged.

Prior to this change, there were still usages of licensee[:ATTRIBUTE_NAME] although there were methods introduced in !57382 (merged) to make the access easier. This change will use those methods in the necessary places.

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because changes are developer facing.
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team