Restore types of byval kernel arguments
Before introduction of full  opaque pointers support in situations when
the frontend uses opaque pointers, but the backend still uses typed the
information about original kernel arguments pointer element types was
lost by spirv-translator and i8* was used instead. This is critical for
byval arguments, so these types must be restored using information from
genx.convert intrinsics.

 Allow usage of TargetExtType with typed pointers
No tests added. Only for experimental purpose.

 Do not convert pointer arguments to int
.

 Add stochastic rounding intrinsic
.

 Fix memory types for llvm-16 build
.

 Move function using macro to cpp file
Clients include this header, so don't force them to define the macro.

 Add cmake option to control installation for in-tree build
.

 Fix in-tree build
Do not limit component installation to external build

 Add intrinsic for efficient matrix load/store/prefetch
The LSC block 2D operations require a matrix descriptor as an argument.
When the vISA finalizer creates the descriptor, it cannot optimize loop-
invariant instructions. So, the finalizer generates a lot of redundant
MOV instructions. This patch adds intrinsics for efficient matrix load,
store, and prefetch operations. The intrinsics take the user-defined
matrix descriptor, which can be properly optimized.

 Add an intrinsic for named barrier arrive/signal operation
.