[llvm] [SPIR-V]: Add SPIR-V extension: SPV_KHR_cooperative_matrix (PR #96091)

[Michal Paszkowski via llvm-commits]

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@@ -66,6 +66,8 @@ static const std::map<std::string, SPIRV::Extension::Extension>
          SPIRV::Extension::Extension::SPV_INTEL_function_pointers},
         {"SPV_KHR_shader_clock",
          SPIRV::Extension::Extension::SPV_KHR_shader_clock},
+        {"SPV_KHR_cooperative_matrix",
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michalpaszkowski wrote:

SPIRVUsage doc file will also need to be updated

https://github.com/llvm/llvm-project/pull/96091