Switch the C compiler for github windows action for mpiintel to the Intel C Complier

The current MPIIntel Windows GitHub action uses the MS C compiler. But for the Intel MPI compiler Windows action, we want the C compiler to be Intel to match the MPI compiler, for example, it should report something like:

-- Selecting Windows SDK version 10.0.22000.0 to target Windows 10.0.26100.
-- The C compiler identification is IntelLLVM 2025.2.0 with MSVC-like command-line