Add a ci tag to limit the pyfaust torch whl package generation to specific gitlab runners.

The runners that have a clang++ version 11 installed to avoid unresolved symbol like :
clang 5.0 when compiling torch linked lib.
_FaustCorePy.cpython-39-x86_64-linux-gnu.so: undefined symbol: _ZN3c106Symbol14fromQualStringERKSs

It fixes by the way the issue #152.