Adding additional usage metrics for Release to weekly ping

What does this MR do?

This changes adds some additional usage metrics for the Release team to the weekly ping payload. These metrics are successful_deployments, failed_deployments, and deployed_pages_projects.

Related to: https://gitlab.com/gitlab-org/gitlab-ce/issues/56190#note_139064294

@nolith @dosuken123 @jlenny, this change adds the additional metrics described in the above issue

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer