[OpenGL] Add support for xcode 13 beta4.

[mandel-macaque]

The ignore overlap between macOS and Catalyst was done via:

# sort todo and ignore
sort -o macOS-OpenGL[ES].sorted macOS-OpenGL[ES].ignore 
sort -o MacCatalyst-OpenGL[ES].sorted MacCatalyst-OpenGL[ES].todo
# compare sorted files
comm -1 -2  MacCatalyst-SystemConfiguration.sorted macOS-OpenGL[ES].sorted  >> MacCatalyst-OpenGL[ES].ignore 

There are 9 selectors not ignored in macOS

!missing-pinvoke! CGLChoosePixelFormat is not bound
!missing-pinvoke! CGLGetCurrentContext is not bound
!missing-pinvoke! CGLLockContext is not bound
!missing-pinvoke! CGLReleaseContext is not bound
!missing-pinvoke! CGLReleasePixelFormat is not bound
!missing-pinvoke! CGLRetainContext is not bound
!missing-pinvoke! CGLRetainPixelFormat is not bound
!missing-pinvoke! CGLSetCurrentContext is not bound
!missing-pinvoke! CGLUnlockContext is not bound

But these are ignored because they are deprecated in mac telling users to use metal.

[vs-mobiletools-engineering-service2]

✅ [PR Build] Tests passed on Build. ✅

Tests passed on Build.

• Azure DevOps
• Html Report (VSDrops)

API diff

✅ API Diff from stable

View API diff

• iOS vsdrops gist
• macOS vsdrops gist
• macCat vsdrops gist
• macCatiOS gist
• tvOS vsdrops gist
• watchOS vsdrops gist

API & Generator diff

✅ API Diff (from PR only) (no change)
✅ Generator Diff (only version changes)

GitHub pages

Results can be found in the following github pages (it might take some time to publish):

• Test results
• API diff
• API & Generator diff

🎉 All 91 tests passed 🎉

Pipeline on Agent XAMBOT-1100.BigSur'
Merge 932641b into ae77aed