ci: Test GCC on MacOS CI

closes KhronosGroup#3062

Update CHANGES for release 12.1.0

Update CHANGES for release 12.1.0

Move check if useStorageBuffer needs to be set.

From TParseContext used only by GLSL, to TParseContextBase inherited by both GLSL and HLSL paths.
It caused compilations from HLSL to SPIR-V 1.3+ to use BufferBlock decoration which is no longer valid.

Update CHANGES for release 12.0.0

Update CHANGES for release 12.0.0

Merge pull request KhronosGroup#3081 from jeremy-lunarg/hayes-update-…

…changes

Update CHANGES for release 11.13.0

Merge pull request KhronosGroup#3081 from jeremy-lunarg/hayes-update-…

…changes

Update CHANGES for release 11.13.0

Merge pull request KhronosGroup#3049 from jeremy-lunarg/hayes-update-…

…changes

Update CHANGES for release 11.12.0

Merge pull request KhronosGroup#3049 from jeremy-lunarg/hayes-update-…

…changes

Update CHANGES for release 11.12.0