Show InlayHints for function pointers

[Befzz]

#define APIENTRY __stdcall
#define APIENTRYP APIENTRY *

#define GLAPI __attribute__ ((dllexport)) extern
#define GLAPI __declspec(dllexport) extern
#define GLAPI extern


// how it is defined by glad gl c generator
typedef void (APIENTRYP PFNGLNAMEDBUFFERSUBDATAPROC)(GLuint buffer, GLintptr offset, GLsizeiptr size, const void *data);
GLAPI PFNGLNAMEDBUFFERSUBDATAPROC glad_glNamedBufferSubData;
#define glNamedBufferSubData glad_glNamedBufferSubData

// this is made by me to clarify the issue
void glNamedBufferSubData_WRAP(GLuint buffer, GLintptr offset, GLsizeiptr size, const void *data){
  glad_glNamedBufferSubData( buffer,  offset,  size, data);
}
void f(){
  glNamedBufferSubData     (        0,        sizeof(float[8]),       sizeof(char)*1,      (void*)(NULL));
  glNamedBufferSubData_WRAP(0, sizeof(float[8]), sizeof(char)*1, (void*)(NULL));
}

desired result:
show inlay hints for function pointers
or make it optional (not sure about performance impact, usefulness etc.)

[HighCommander4]

Proposed fix: https://reviews.llvm.org/D158249