testing: add getrf std interface testing and vendor testing

See merge request !511

testing: threads option must be initialized different from 0 in CHAMELEON_TESTINGS_VENDOR mode to avoid a CHAMELEON_Init failure.

testing: add warning if STARPU_FXT_TRACE=1 but no --trace option

See merge request !510

People tend to forget to set --trace option.

add_result.py: trigger a regression error only if the measured gflops value is...

See merge request !509

add_result.py: trigger a regression error only if the measured gflops value is smaller than previous mean

ci: add test_starpu_cuda

See merge request !507

cmake: fix this if when MPI_C_LIBRARIES is made of a list of several libraries

See merge request !508

cmake: fix this if when MPI_C_LIBRARIES is made of a list of several libraries. This fixes cmake with nmad/madmpi.

GETRF: Add a bcast version of the workspace without ring

See merge request !504

getrf: Add a bcast version of the workspace copy and the possibility to switch after ringswitch iterations to the ring bcast

Make sure testings are succeeding when SBC is enabled.

See merge request !503

Update CI to fix sonarqube job and use chameleon_env script in build

See merge request !502

sonarqube job: fix the git grep call of ./tools/find_sources.sh by fixing the gitlab-ci "detected dubious ownership in repository" problem

Update docker environment, use shared runners, and plafrim for cuda/rocm

See merge request !501

pkg-config: remove the cuda.pc and mpi.pc required dependencies, these files are not common and not installed usually
ChameleonPkgConfig.cmake: find the precise mpi .pc file to add in chameleon.pc required packages