mesa: include mtypes.h less

- remove mtypes.h from most header files
- add main/menums.h for often used definitions
- remove main/core.h

v2: fix radv build

Reviewed-by: Brian Paul <brianp@vmware.com>

src/compiler/glsl/builtin_functions.h

@@ -24,6 +24,8 @@
 #ifndef BULITIN_FUNCTIONS_H
 #define BULITIN_FUNCTIONS_H
 
+struct gl_shader;
+
 extern void
 _mesa_glsl_initialize_builtin_functions();