Add some missing cluster metrics to usage data

What does this MR do?

Adds the following new metrics to usage data:

- Instance level clusters enabled
- Instance level clusters disabled
- Clusters with a management project associated

Query plans

Enabled instance clusters (no date restriction):

• Full query: https://explain.depesz.com/s/J7EU
• Min ID: https://explain.depesz.com/s/tMkE
• Max ID: https://explain.depesz.com/s/bfQt
• Batch count: https://explain.depesz.com/s/4bph

Enabled instance clusters (with date restriction):

• Full query: https://explain.depesz.com/s/doWe
• Min ID: https://explain.depesz.com/s/py6d
• Max ID: https://explain.depesz.com/s/jIzB
• Batch count: https://explain.depesz.com/s/NaE2

Disabled instance clusters:

(identical to the above)

Clusters with management project (no date restriction)

• Full query: https://explain.depesz.com/s/liaQ
• Min ID: https://explain.depesz.com/s/pqR2
• Max ID: https://explain.depesz.com/s/KEg3
• Batch count: https://explain.depesz.com/s/pIsA

Clusters with management project (with date restriction)

• Full query: https://explain.depesz.com/s/LPTZ
• Min ID: https://explain.depesz.com/s/UTjn
• Max ID: https://explain.depesz.com/s/K75n
• Batch count: https://explain.depesz.com/s/HtSy

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

#119235 (closed)