Determine differences between language supported by DXC and Clang that require changes to DML shaders

[spall]

Determine and document differences between language supported by DXC and Clang.
create issues to update DML shaders

[farzonl]

We need to burn down this list

error: call to 'clamp' is ambiguous
error: Unsupported intrinsic for DXIL lowering
error: call to 'dot' is ambiguous
error: call to 'min' is ambiguous
error: Cannot create BufferLoad operation: Invalid overload type
error: Cannot create BufferStore operation: Invalid overload type
error: call to 'max' is ambiguous
error: Cannot create RawBufferLoad operation: Invalid overload type
error: call to 'WaveReadLaneAt' is ambiguous
error: Cannot create RawBufferStore operation: Invalid overload type
error: clang frontend command failed with exit code 134 (use -v to see invocation)
error: no matching function for call to 'select'
error: invalid operands to binary expression ('float16_t' (aka 'half') and 'int')
error: array initializer must be an initializer list
error: call to 'rcp' is ambiguous
error: assigning to 'uint32_t8' (aka 'vector<uint, 4>[2]') from incompatible type 'hlsl_constant uint32_t8' (aka 'hlsl_constant vector<uint, 4>[2]')
error: invalid operands to binary expression ('float32_t' (aka 'float') and 'int')
error: expected ';' after return statement
error: call to 'pow' is ambiguous
error: call to 'Sub' is ambiguous

[farzonl]

The list is now:

5040x error: resource has implicit register binding [-Whlsl-implicit-binding]
324x error: clang frontend command failed with exit code 134 (use -v to see invocation)
    ScalarExprEmitter::VisitOpaqueValueExpr
    OpLowerer::cleanupHandleCasts()
    DXILResourceAccessLegacy::runOnFunction
    clang::CodeGen::CodeGenFunction::getOrCreateOpaqueRValueMapping(clang::OpaqueValueExpr const*)
20x error: array initializer must be an initializer list
16x error: assigning to 'uint32_t8' (aka 'vector<uint, 4>[2]') from incompatible type 'hlsl_constant uint32_t8' (aka 'hlsl_constant vector<uint, 4>[2]')

The last two issues there are open PRs for:
llvm/llvm-project#133508
llvm/llvm-project#134174

[farzonl]

Remainng errors after memset pr lands:

609x error: resource has implicit register binding [-Whlsl-implicit-binding]
248x error: Cannot create BufferLoad operation: Invalid overload type
248x error: Cannot create BufferStore operation: Invalid overload type
182x error: binding type 't' only applies to SRV resources
116x error: Cannot create RawBufferLoad operation: Invalid overload type
100x error: Cannot create RawBufferStore operation: Invalid overload type
20x error: array initializer must be an initializer list
8x error: Unsupported intrinsic llvm.memcpy.p0.p2.i32 for DXIL lowering
4x error: Unsupported intrinsic llvm.memcpy.p3.p3.i32 for DXIL lowering
2x error: clang frontend command failed with exit code 139 (use -v to see invocation)