Build artefact incorrectly reused

[Victor-Jung]

Some build artefacts for the GEMM are reused when they should not be. When running two GEMM tests, where the first uses 1 column and the second uses 8 columns, the runtimes are the same (see logs below). If I delete the build folder and run a test on 8 columns, then the latency is correctly reduced.

(iron)  🐍 iron  jungvi@grays  /scratch/jungvi/IRON   devel ±  pytest iron/operators/gemm/ -v --iterations=1 -s
==================================================================================================================== test session starts =====================================================================================================================
platform linux -- Python 3.12.12, pytest-9.0.2, pluggy-1.6.0 -- /scratch/jungvi/micromamba/envs/iron/bin/python3.12
cachedir: .pytest_cache
rootdir: /scratch/jungvi/IRON
configfile: pytest.ini
plugins: xdist-3.8.0
collected 1 item

iron/operators/gemm/test.py::test_gemm[gemm_2048x2048x2048_64x64x64_1cols]
Latency (us): 48605.1
Effective Bandwidth: 5.177610e-01 GB/s
Throughput: 3.534582e+02 GFLOP/s

PASSED

===================================================================================================================== 1 passed in 4.14s ======================================================================================================================
(iron)  🐍 iron  jungvi@grays  /scratch/jungvi/IRON   devel ±  pytest iron/operators/gemm/ -v --iterations=1 -s
==================================================================================================================== test session starts =====================================================================================================================
platform linux -- Python 3.12.12, pytest-9.0.2, pluggy-1.6.0 -- /scratch/jungvi/micromamba/envs/iron/bin/python3.12
cachedir: .pytest_cache
rootdir: /scratch/jungvi/IRON
configfile: pytest.ini
plugins: xdist-3.8.0
collected 1 item

iron/operators/gemm/test.py::test_gemm[gemm_2048x2048x2048_64x64x64_8cols]
Latency (us): 48537.7
Effective Bandwidth: 5.184799e-01 GB/s
Throughput: 3.539489e+02 GFLOP/s

PASSED

(iron)  🐍 iron  jungvi@grays  /scratch/jungvi/IRON   devel ±  rm -rf build
(iron)  ✘  🐍 iron  jungvi@grays  /scratch/jungvi/IRON   devel ±  pytest iron/operators/gemm/ -v --iterations=5 -s
==================================================================================================================== test session starts =====================================================================================================================
platform linux -- Python 3.12.12, pytest-9.0.2, pluggy-1.6.0 -- /scratch/jungvi/micromamba/envs/iron/bin/python3.12
cachedir: .pytest_cache
rootdir: /scratch/jungvi/IRON
configfile: pytest.ini
plugins: xdist-3.8.0
collected 5 items

iron/operators/gemm/test.py::test_gemm[iter0-gemm_2048x2048x2048_64x64x64_8cols]
Latency (us): 6994.5
Effective Bandwidth: 3.597969e+00 GB/s
Throughput: 2.456213e+03 GFLOP/s

PASSED