WIP: Resolve "Rename Cycle Analytics to Value Stream Analytics" (in docs)

What does this MR do?

This change corresponds to this MR: !23427 (merged)

Intent:

1. Rename all instances of Cycle Analytics to Value Stream Analytics in our docs 1a) Move content from respective cycle_anayltics.md files to value_analytics_*.md (probably value_analytics.md, value_analytics_ 1b) Include links

Screenshots

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 #38319 (closed)