ci: increase test sharding to reduce disk usage

[Oppen]

CI pipelines keep exhausting storage. Increase the number of shards.

Checklist

• Linked to Github Issue
• Unit tests added
• Integration tests added.
• This change requires new documentation.
  • Documentation has been added/updated.
  • CHANGELOG has been updated.

[codecov]

Codecov Report

Merging #1452 (6b42da6) into main (fdf61bd) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1452   +/-   ##
=======================================
  Coverage   96.99%   96.99%           
=======================================
  Files          93       93           
  Lines       38773    38773           
=======================================
  Hits        37606    37606           
  Misses       1167     1167           

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[github-actions]

Benchmark Results for unmodified programs 🚀

Command	Mean [s]	Min [s]	Max [s]	Relative
base big_factorial	5.471 ± 0.059	5.373	5.556	1.01 ± 0.01
head big_factorial	5.410 ± 0.038	5.364	5.470	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base big_fibonacci	4.664 ± 0.041	4.596	4.721	1.00
head big_fibonacci	4.698 ± 0.059	4.624	4.779	1.01 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base blake2s_integration_benchmark	12.985 ± 0.154	12.821	13.283	1.00 ± 0.02
head blake2s_integration_benchmark	12.971 ± 0.178	12.789	13.334	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base compare_arrays_200000	4.665 ± 0.065	4.554	4.750	1.00
head compare_arrays_200000	4.667 ± 0.060	4.588	4.821	1.00 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base dict_integration_benchmark	3.077 ± 0.019	3.042	3.109	1.00
head dict_integration_benchmark	3.110 ± 0.080	3.049	3.317	1.01 ± 0.03

Command	Mean [s]	Min [s]	Max [s]	Relative
base field_arithmetic_get_square_benchmark	2.115 ± 0.021	2.070	2.143	1.00 ± 0.01
head field_arithmetic_get_square_benchmark	2.109 ± 0.018	2.085	2.138	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base integration_builtins	12.666 ± 0.108	12.556	12.909	1.00
head integration_builtins	12.771 ± 0.190	12.616	13.256	1.01 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base keccak_integration_benchmark	13.241 ± 0.157	13.032	13.460	1.01 ± 0.02
head keccak_integration_benchmark	13.168 ± 0.135	12.911	13.360	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base linear_search	4.638 ± 0.050	4.561	4.694	1.00
head linear_search	4.648 ± 0.054	4.548	4.727	1.00 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base math_cmp_and_pow_integration_benchmark	3.302 ± 0.033	3.243	3.343	1.00
head math_cmp_and_pow_integration_benchmark	3.342 ± 0.031	3.286	3.384	1.01 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base math_integration_benchmark	2.994 ± 0.028	2.971	3.047	1.00
head math_integration_benchmark	3.006 ± 0.025	2.980	3.044	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base memory_integration_benchmark	2.655 ± 0.040	2.612	2.734	1.00
head memory_integration_benchmark	2.694 ± 0.046	2.644	2.795	1.01 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base operations_with_data_structures_benchmarks	2.890 ± 0.018	2.872	2.926	1.00
head operations_with_data_structures_benchmarks	2.894 ± 0.028	2.854	2.934	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base pedersen	1.049 ± 0.013	1.034	1.080	1.00
head pedersen	1.062 ± 0.016	1.034	1.083	1.01 ± 0.02

Command	Mean [s]	Min [s]	Max [s]	Relative
base poseidon_integration_benchmark	1.983 ± 0.029	1.933	2.024	1.00 ± 0.02
head poseidon_integration_benchmark	1.976 ± 0.018	1.950	2.009	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base secp_integration_benchmark	3.833 ± 0.029	3.789	3.880	1.00
head secp_integration_benchmark	3.850 ± 0.045	3.776	3.942	1.00 ± 0.01

Command	Mean [s]	Min [s]	Max [s]	Relative
base set_integration_benchmark	2.380 ± 0.051	2.334	2.465	1.01 ± 0.03
head set_integration_benchmark	2.358 ± 0.033	2.304	2.414	1.00

Command	Mean [s]	Min [s]	Max [s]	Relative
base uint256_integration_benchmark	8.021 ± 0.064	7.919	8.132	1.00
head uint256_integration_benchmark	8.103 ± 0.087	7.999	8.303	1.01 ± 0.01