Update REDIS* to VALKEY* in object.c and utils/create-cluster/README

[WM0323]

1. Rename REDIS_* macros defined in object.c to VALKEY_*,
2. Rename Redis to Valkey , redis-cli to valkey-cli in logs (i.e. put statement) and descriptions in object.c and utils/create-cluster/README

[madolson]

Small suggestion in object.c, looks good otherwise.

[codecov]

Codecov Report

Attention: Patch coverage is 37.50000% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 68.39%. Comparing base (4948d53) to head (21f3329).
Report is 4 commits behind head on unstable.

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable     #380      +/-   ##
============================================
+ Coverage     68.37%   68.39%   +0.01%     
============================================
  Files           108      108              
  Lines         61562    61563       +1     
============================================
+ Hits          42096    42103       +7     
+ Misses        19466    19460       -6     

Files	Coverage Δ
src/object.c	78.41% <37.50%> (+0.43%)	⬆️

... and 10 files with indirect coverage changes