Use return type info from sierra when serializing return values in cairo1-run crate

[fmoletta]

Closes #1664
Uses sierra program data to serialize each return value according to its concrete type.
Removes the public serialize_output function in favor of an internal serialize_output function used by cairo_run_program.
Possible follow up work: See if we can find the names of the enum variants & struct fields in the sierra program data and include them in the serialization.

[codecov]

Codecov Report

Attention: Patch coverage is 90.41916% with 32 lines in your changes are missing coverage. Please review.

Project coverage is 96.64%. Comparing base (0b6d116) to head (014b4af).

Files	Patch %	Lines
cairo1-run/src/cairo_run.rs	90.18%	32 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1665      +/-   ##
==========================================
- Coverage   96.70%   96.64%   -0.07%     
==========================================
  Files          95       95              
  Lines       38154    38375     +221     
==========================================
+ Hits        36897    37087     +190     
- Misses       1257     1288      +31     

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[github-actions]

Benchmark Results for unmodified programs 🚀

Command	Mean [s]	Min [s]	Max [s]	Relative
base big_factorial	2.281 ± 0.053	2.234	2.409	1.01 ± 0.02
head big_factorial	2.252 ± 0.015	2.225	2.270	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base big_fibonacci	2.293 ± 0.055	2.249	2.395	1.00 ± 0.04
head big_fibonacci	2.293 ± 0.073	2.238	2.471	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base blake2s_integration_benchmark	8.333 ± 0.116	8.218	8.512	1.00
head blake2s_integration_benchmark	8.367 ± 0.120	8.218	8.530	1.00 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base compare_arrays_200000	2.330 ± 0.043	2.267	2.403	1.00
head compare_arrays_200000	2.342 ± 0.040	2.310	2.445	1.00 ± 0.03

Command	Mean [s]	Min [s]	Max [s]	Relative
base dict_integration_benchmark	1.443 ± 0.022	1.426	1.494	1.00
head dict_integration_benchmark	1.445 ± 0.022	1.423	1.498	1.00 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base field_arithmetic_get_square_benchmark	1.292 ± 0.012	1.275	1.310	1.00
head field_arithmetic_get_square_benchmark	1.304 ± 0.014	1.284	1.328	1.01 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base integration_builtins	8.427 ± 0.128	8.278	8.576	1.00
head integration_builtins	8.437 ± 0.153	8.279	8.619	1.00 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base keccak_integration_benchmark	8.632 ± 0.144	8.477	8.804	1.00
head keccak_integration_benchmark	8.708 ± 0.123	8.504	8.844	1.01 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base linear_search	2.318 ± 0.026	2.297	2.386	1.00
head linear_search	2.344 ± 0.026	2.317	2.406	1.01 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base math_cmp_and_pow_integration_benchmark	1.575 ± 0.015	1.558	1.610	1.01 ± 0.01
head math_cmp_and_pow_integration_benchmark	1.564 ± 0.012	1.550	1.586	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base math_integration_benchmark	1.415 ± 0.014	1.401	1.437	1.00
head math_integration_benchmark	1.422 ± 0.009	1.406	1.432	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base memory_integration_benchmark	1.270 ± 0.039	1.247	1.370	1.00 ± 0.03
head memory_integration_benchmark	1.266 ± 0.020	1.245	1.303	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base operations_with_data_structures_benchmarks	1.591 ± 0.007	1.582	1.600	1.00
head operations_with_data_structures_benchmarks	1.601 ± 0.007	1.592	1.616	1.01 ± 0.01

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
base pedersen	589.9 ± 1.1	588.0	591.4	1.00
head pedersen	592.0 ± 4.5	588.4	601.2	1.00 ± 0.01

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
base poseidon_integration_benchmark	983.7 ± 6.8	973.1	993.8	1.00
head poseidon_integration_benchmark	986.5 ± 11.9	977.6	1016.9	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base secp_integration_benchmark	1.869 ± 0.005	1.860	1.877	1.00
head secp_integration_benchmark	1.874 ± 0.052	1.844	2.019	1.00 ± 0.03

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
base set_integration_benchmark	743.8 ± 2.4	740.6	748.4	1.00
head set_integration_benchmark	747.0 ± 4.7	742.2	759.1	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base uint256_integration_benchmark	4.607 ± 0.033	4.542	4.639	1.00
head uint256_integration_benchmark	4.658 ± 0.165	4.559	5.118	1.01 ± 0.04