[SM6.10] Codegen for attributed LinAlg Matrix types

[hekota]

Adds codegen for Attributed LinAlgMatrix types. Each type is translated into its corresponding DXIL type %dx.types.LinAlgMatrix<mangling> where <mangling> encodes the matrix attributes.

For example this type:

__builtin_LinAlgMatrix [[__LinAlgMatrix_Attributes(ComponentType::I32, 4, 5, MatrixUse::B, MatrixScope::ThreadGroup)]]

Will be traslated to %dx.types.LinAlgMatrixC4M4N5U1S2.

Also adds !dx.targetTypes metadata node that lists all LinAlgMatrix types that were ever used in the module. For the example above that would be:

!dx.targetTypes = !{!1}
!1 ! = = !{%dx.types.LinAlgMatrixC4M4N5U1S2 undef, i32 4, i32 4, i32 5, i32 1, i32 2}

Later after optimizations these metadata nodes should be pruned to contain only the types actually used in the module (task #8133).

Fixes #8123
Fixes #8127

[tex3d]

Main point: "TargetTypes" sounds more general than this appears to be. Should we make the metadata more general with a class identifier, or change the name to be more specific?

[github-actions]

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darker --check --diff -r 57a71b0cc5837c5989038734b12076655285918d..f666744dd794a60982e6ef8a47be1031e8a2c830 utils/hct/hctdb.py

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--- hctdb.py	2026-02-11 21:19:12.000000 +0000
+++ hctdb.py	2026-02-12 06:46:13.438004 +0000
@@ -1181,11 +1181,11 @@
             i.shader_stages = (
                 "compute",
                 "mesh",
                 "amplification",
             )
-    
+
         for i in insts("DebugBreak", "IsDebuggerPresent"):
             i.category = "Debugging"
             i.shader_model = experimental_sm
 
     def populate_llvm_instructions(self):

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