[clang] [llvm] [HLSL][DXIL][SPRIV] Added `GroupMemoryBarrier()` (PR #185383)

[Steven Perron via llvm-commits]

s-perron wrote:

> > Sorry I didn't pick up on this earlier. I should have looked closer.
> 
> Yah no worries :)
> 
> I made it into `AcquireRelease` now and locally that succeeds the test after adding the `WorkGroupMemory` semantic, which is required for the `WorkGroup` Scope. I added an assert for this.
> 
> In the future for `DeviceMemoryBarrier()`, should I also check that `UniformMemory` and `ImageMemory` is set?

Yes that would be great thanks.

https://github.com/llvm/llvm-project/pull/185383