Disable expiration policy if dict is absent from API

What does this MR do?

This MR stems from #15398 (comment 273316264) and resolves the conversation by adding an alert message that informs the user that the functionality is turned off for older project (Project that does not have the container_expiration_policy dictionary in the API response )

Screenshots

Project without container_expiration_policy

Project with container_expiration_policy

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

Part of #15398 (closed)