helm: Update to Redis 8.2.1 and bitnamilegacy temporarily

[nellh]

Critical update to our Redis chart as Bitnami has removed the image we were using. This is a temporary fix, we should move to our own template for Redis or another chart soon.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 42.93%. Comparing base (ae223fd) to head (a4cf3c9).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3592      +/-   ##
==========================================
+ Coverage   41.15%   42.93%   +1.78%     
==========================================
  Files         582      633      +51     
  Lines       31182    33142    +1960     
  Branches     1479     1479              
==========================================
+ Hits        12833    14231    +1398     
- Misses      18210    18772     +562     
  Partials      139      139              

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