Refactor DAGRUN command parsing

[alonre24]

Cancel the steps for modelget and modelset ops: modelset is done in parsing time, modelget in the reply.

[codecov]

Codecov Report

Merging #551 (e56046f) into master (671e157) will decrease coverage by 1.21%.
The diff coverage is 94.17%.

@@            Coverage Diff             @@
##           master     #551      +/-   ##
==========================================
- Coverage   75.74%   74.52%   -1.22%     
==========================================
  Files          35       35              
  Lines        5701     5644      -57     
==========================================
- Hits         4318     4206     -112     
- Misses       1383     1438      +55     

Impacted Files	Coverage Δ
src/redisai.h	0.00% <ø> (ø)
src/tensor.c	82.01% <83.78%> (-1.97%)	⬇️
src/command_parser.c	91.87% <93.75%> (+1.87%)	⬆️
src/DAG/dag_parser.c	91.49% <95.23%> (+3.85%)	⬆️
src/DAG/dag.c	85.80% <100.00%> (-1.08%)	⬇️
src/redisai.c	83.02% <100.00%> (+0.02%)	⬆️
src/run_info.c	71.85% <100.00%> (-1.29%)	⬇️
src/modelRun_ctx.c	46.26% <0.00%> (-37.32%)	⬇️
src/script.c	63.39% <0.00%> (-16.34%)	⬇️
src/libtorch_c/torch_c.cpp	55.03% <0.00%> (-2.02%)	⬇️
... and 4 more

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