--no-params for MicrosoftDemangle.h

[MaskRay]

#75348 added --no-params to llvm-cxxfilt (primarily for ItaniumDemangle) to skip demangling parameter types, modeled after c++filt --no-params.

<bare-function-type> ::= <signature type>+
	# types are possible return type, then parameter types

This makes the output smaller and therefore improves performance when the user doesn't need paramemter types.
It might be useful for ../blob/main/llvm/include/llvm/Demangle/MicrosoftDemangle.h to support a similar feature.

Note: llvm-cxxfilt does not support MicrosoftDemangle.h