[LLVMGPU] Refactor VirtualMMAIntrinsic to it's own attribute and enum. #14398

Job	Run time
setup / setup	9s
Build Packages / Linux Release (x86_64)	14m 28s
Test AMD MI250 / test_mi250	5m 46s
Test AMD MI300 / test_mi300	3m 20s
Regression Test / test_regression_suite :: cpu_llvm_task	9m 50s
Regression Test / test_models :: cpu_llvm_task	4m 14s
Test AMD W7900 / test_w7900	1m 48s
Regression Test / test_regression_suite :: amdgpu_rocm_mi250_gfx90a	11m 22s
Regression Test / test_models :: amdgpu_rocm_mi250_gfx90a	7m 30s
Unit Test / Linux (x86_64)	2m 43s
Regression Test / test_regression_suite :: amdgpu_rocm_mi300_gfx942	8m 45s
Regression Test / test_models :: amdgpu_rocm_mi300_gfx942	3m 46s
Regression Test / test_models :: amdgpu_vulkan	1m 36s
Test ONNX / test_onnx_models :: cpu_llvm_task	3m 22s
Test Android / android_arm64	6m 20s
Test ONNX / test_onnx_ops :: cpu_llvm_sync	4m 10s
Test ONNX / test_onnx_ops :: amdgpu_rocm_rdna3	8m 41s
Test ONNX / test_onnx_ops :: amdgpu_vulkan	1m 48s
Test RISC-V 64 / riscv64	5m 5s
Test TensorFlow / Linux (x86_64)	2m 9s
	1h 46m 52s

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