chore: Adding Redis metrics and dashboard to observability stack

[nidhi-nair]

Description

Starts to send Redis operation spans via Zipkin and observation metrics via Prometheus. Adds Redis metrics to our observability stack as well.

PR fixes following issue(s)

Fixes #24024

Type of change

• Chore (housekeeping or task changes that don't impact user perception)

Testing

How Has This Been Tested?

• Manual

Checklist:

Dev activity

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• PR is being merged under a feature flag

[sharat87]

Looks good.