Resolve "Add release count to project homepage"

What does this MR do?

Resolves: #36667 (closed)

Adds a Release count statistic to project pages. The statistic links to the projects Releases page. If the project has not created any releases, no icon or count is shown.

Screenshots

If a project has one or more releases, they get a rocket icon with a release count, which links to their releases page:

If a project has two or more releases, the release count is plural e.g. "2 Releases":

If a project hasn't created any releases, we don't show the rocket icon or count:

Mobile (iPhone X) with icon and release count:

Mobile with 2 releases has plural text:

GIF of adding a release and seeing the counter appear:

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 #36667 (closed)