Add a global feature flag for tracking using Redis HLL [RUN ALL RSPEC] [RUN AS-IF-FOSS]

What does this MR do?

Add `redis_hll_tracking` ops feature flag

  - Add a global feature for tracking using Redis HLL
  and for adding the Redis data in Usage Ping
  - Add this feature to protect in case of performance
  issues as feature flags specific per event are removed

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?


Availability and Testing


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

Related to #325290 (closed)

Edited by 🤖 GitLab Bot 🤖