Aof rewrite not covered fix

[alonre24]

After merging a fix to RLTest that allows making aof rewrite without using rdb preamble - now we are covering aof rewrite in tests.
This includes fixing minor bug in model store command - AOF rewrite always sends 0 in the optional args of batchsize, minbatchsize, minbatchtimeout, so we shouldn't return an error immediately if we see that one of an these args was given while another required arg is 0, unless it is non-zero by itself (for example, batchsize=0 and minbatchsize=0 is ok, but batchsize=0 and minbatchsize>0 is not).

[codecov]

Codecov Report

Merging #800 (f6ca7a6) into master (0000228) will increase coverage by 5.77%.
The diff coverage is 80.64%.

@@            Coverage Diff             @@
##           master     #800      +/-   ##
==========================================
+ Coverage   74.11%   79.89%   +5.77%     
==========================================
  Files          39       53      +14     
  Lines        6081     8037    +1956     
==========================================
+ Hits         4507     6421    +1914     
- Misses       1574     1616      +42     

Impacted Files	Coverage Δ
src/redis_ai_types/model_type.c	70.00% <ø> (ø)
src/redis_ai_types/script_type.c	70.00% <ø> (+5.00%)	⬆️
src/redis_ai_types/tensor_type.c	73.33% <ø> (ø)
src/serialization/AOF/rai_aof_rewrite.c	0.00% <0.00%> (ø)
tests/module/DAG_utils.c	88.23% <ø> (ø)
tests/module/LLAPI.c	74.46% <ø> (ø)
tests/unit/rmalloc.h	100.00% <ø> (ø)
tests/unit/unit_tests_err.cpp	100.00% <ø> (ø)
.../serialization/RDB/decoder/previous/v2/decode_v2.c	36.74% <36.74%> (ø)
src/backends/libtflite_c/tflite_c.cpp	58.16% <46.00%> (ø)
... and 79 more

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