[clang] [MinGW] Pass --no-demangle through to the mingw linker

Clang has custom handling of --no-demangle, where it is removed
from the input -Wl and -Xlinker options, and readded specifically
by the drivers where it's known to be supported.

Both ld.bfd and lld support the --no-demangle option. This handles
the option in the same way as in ToolChains/Gnu.cpp.

Differential Revision: https://reviews.llvm.org/D114064