[MLIR][IRDL][CMake] Switch to using setup_host_tool to fix cross compilation
#156603
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…mpilation Using `build_native_tool` directly doesn't seem to be standard, instead other tools seem to call `setup_host_tool` (e.g. milr-linalg-ods-gen and `add_tablegen` seems to have a copy of `setup_host_tool` internally). When cross compiling llvm in two stages, the first building all native tools and then the second using those built tools to cross compile, this prevents the second stage from trying to rebuild mlir-irdl-to-cpp, which fails.
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Using
build_native_tooldirectly doesn't seem to be standard, instead other tools seem to callsetup_host_tool(e.g. milr-linalg-ods-gen andadd_tablegenseems to have a copy ofsetup_host_toolinternally).When cross compiling llvm in two stages, the first building all native tools and then the second using those built tools to cross compile, this prevents the second stage from trying to rebuild mlir-irdl-to-cpp, which fails.