Usage quotas update storage tooltip content

What does this MR do?

Note: The changes are behind additional_repo_storage_by_namespace feature flag

From this comment we are updating the copy of the warning and locked projects tooltips on the usage quota page.

Screenshots (strongly suggested)

Case	Warning tooltip	Locked tooltip
Storage NOT purchased	This project is near the free %{actualRepositorySizeLimit} limit and at risk of being locked.	This project is locked because it is using %{actualRepositorySizeLimit} of free storage and there is no purchased storage available.
Storage purchased	This project is at risk of being locked because purchased storage is running low.	This project is locked because it used %{actualRepositorySizeLimit} of free storage and all the purchased storage.

cc @dbodicherla @rhardarson

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