Update CI & monitoring integrations to use shared modules

What does this MR do and why?

This MR refactors Integrations::BaseCi class that inherit from Integration and makes them modules to be included in Integration classes, in order to later on be used in instance integrations, as part of our effort to split integrations table into instance/non-instance to support the new Cells architecture &14638

Mentions #474809 (closed)

References

Please include cross links to any resources that are relevant to this MR This will give reviewers and future readers helpful context to give an efficient review of the changes introduced.

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.