[LLVMGPU] Add im2col pipeline for convolution codegen #28212

Job	Run time
setup / setup	8s
build_test_runtime :: ubuntu-20.04	8m 46s
build_test_all_bazel	2m 38s
small_runtime	3m 43s
build_test_runtime :: windows-2022	26m 33s
tracing	7m 6s
build_test_runtime :: macos-14	4m 42s
build_all / build_all	9m 22s
build_and_test_android / cross_compile	2m 30s
build_and_test_android / test_on_${{ matrix.target.device-name }}	0s
summary	5s
	1h 5m 33s

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