Add compatibility test with Valkey 8.0/8.1

[hpatro]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.48%. Comparing base (507042d) to head (05a1fe7).

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #2342      +/-   ##
============================================
- Coverage     71.49%   71.48%   -0.01%     
============================================
  Files           123      123              
  Lines         67110    67110              
============================================
- Hits          47977    47973       -4     
- Misses        19133    19137       +4     

see 14 files with indirect coverage changes

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[hpatro]

Note:

Send cluster message via module from other server to latest fails consistently with 8.1 -> latest. Need to debug further.