Implement GETDEL and GETEX

[danielealbano]

This PR implements the GETDEL and the GETEX commands

[codecov[bot]]

Codecov Report

Merging #196 (4296321) into main (8048eca) will increase coverage by 0.05%. The diff coverage is 87.27%.

@@            Coverage Diff             @@
##             main     #196      +/-   ##
==========================================
+ Coverage   80.35%   80.41%   +0.05%     
==========================================
  Files         125      127       +2     
  Lines        7498     7553      +55     
==========================================
+ Hits         6025     6073      +48     
- Misses       1473     1480       +7     

Impacted Files	Coverage Δ
.../module/redis/command/module_redis_command_getex.c	85.29% <85.29%> (ø)
...module/redis/command/module_redis_command_getdel.c	90.48% <90.48%> (ø)

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