If relax-logical-pointer is enabled, this commit makes Validator
accept function param even when its Storage Class is different from
the expected one.
Related to #2423, #2430
In relaxed addressing mode, we want to accept non memory objects
because this is a very natural translation of hlsl. It should be fixed
by legalization by inlining the calls.
This is required to properly handle uses of forward declared ids. Since forward
declared ids were not being properly covered by the validator this uncovered a
bunch of small issues that needed to be resolved to get tests passing again.
Fixes#2373
* Moved function opcode validation out of idUsage and into new files
* minor style changes
* General opcode checking is in validate_function.cpp
* Execution limitation checking is in
validate_execution_limitations.cpp
* Execution limitations was split into a new pass as it requires other
validation to register those limitations first.
