Exposed deployment build manual actions for merge request page

What does this MR do?

As more information needs to be added in the environment status section of the MR page (see this issue for more details: #35458 (closed)), this MR updates some Entity classes related to this section.

Updates:

• Exposed play_path and retry_path for any manual deployment job (retry_path being displayed only when the manual job has failed)
• Added which current builds have failed

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• 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

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

Closes #35458 (closed)