feat: add support for customizable annotations for Redis and Sentinel…

[hanbing204]

Description

add support for customizable annotations for Redis and Sentinel pods

• Introduced new Helm chart template parameters to allow custom annotations
  to be added to Redis and Sentinel pods.
• This enhancement enables more flexible deployment configurations and
  can help with integrations requiring specific pod-level metadata.

Fixes #1588

Type of change

• New feature (non-breaking change which adds functionality)

Checklist

• Tests have been added/modified and all tests pass.
• Functionality/bugs have been confirmed to be unchanged or fixed.
• I have performed a self-review of my own code.
• Documentation has been updated or added where necessary.

Additional Context