cm_cxx_features: Filter out 'icpc: command line warning #10121'

This warning appears for:

overriding '-xCORE-AVX2' with '-march=haswell'`

in some Cray environments.

icpc warnings fail the unique_ptr cxx test in cm_cxx_features.cmake. This added regex avoids this problems on Cray XC40 systems at LANL.

Fixes: #20664 (closed)
Backport: release
Topic-rename: cm_cxx_features-icpc-10121