[llvm] [SPIR-V] Add implementation of the non-const G_BUILD_VECTOR and fix emission of the OpGroupBroadcast instruction (PR #103050)

[Michal Paszkowski via llvm-commits]

michalpaszkowski wrote:

Thank you! Confirmed this pull request solves the issue in #97310!
```
./test_workgroups work_group_broadcast_2D
 Initializing random seed to 0.
Requesting Default device based on command line for platform index 0 and device index 0
Compute Device Name = Intel(R) Graphics [0xa780], Compute Device Vendor = Intel(R) Corporation, Compute Device Version = OpenCL 3.0 NEO , CL C Version = OpenCL C 1.2 
Device latest conformance version passed: v2022-04-22-00
Supports single precision denormals: YES
sizeof( void*) = 8  (host)
sizeof( void*) = 8  (device)
work_group_broadcast_2D...
work_group_broadcast_2D test passed
work_group_broadcast_2D passed
PASSED sub-test.
PASSED test.
```

https://github.com/llvm/llvm-project/pull/103050