Reviewed formating to follow raylib coding conventions.

rlCullFace sets the face culling mode to RL_FRONT or RL_BACK which correspond to GL_FRONT and GL_BACK respectively.

As generation is done in software, it's up to the user to do it. `ImageMipmaps()` is already provided for reference.

* [rlgl] Check for extensions before enabling them

* Shift to glad on macOS

* #undef CORE_OPENGL_33

* Remove version hack and fix ASTC compression assumption

* Remove loader from glad

* Use GLAD_MALLOC/FREE instead of malloc/free

* More explicit extension checking

raylib library tries to avoid `long long` usage. Several SSBO functions have been reviewed (including some renames for consistency) to minimize `long long` type usage.

Updated version to `rlgl 4.2`

rlGetGlTextureFormats was expecting unsigned int, corrected variables according to that.

This reverts commit 8fe6bfabbf.

* Add support for truncating parser input

* Remove RLAPI from implementations in rlgl.h

Now that 4.3 was added this can be enabled with the compile flag.