Adds Composer cache task

What does this MR do?

Adds a rake task to build the composer cache file. It simply iterate over the composer packages and delegates the call to the Cache class.

This is meant to be used as maintenance in cache the files are lost but also to kickstart the initial cache. It will need to be run in production at some point in the near future.

We currently have < 20k packages to process so this should be an easy task to run.

Screenshots (strongly suggested)

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
• 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

Related to #290288 (closed)