Do not require cross compilation for Ubuntu arm target ci

Author: mcbarton

.github/workflows/main.yml

@@ -22,23 +22,8 @@ jobs:
             os: ubuntu-24.04
 
           - artifact: arm64-linux
-            os: ubuntu-24.04
+            os: ubuntu-24.04-arm
             rust_target: aarch64-unknown-linux-gnu
-            env:
-              # Don't build a sysroot for this cross-compiled target since it
-              # would require a host compiler and the sysroot is otherwise
-              # already built on other CI builders.
-              WASI_SDK_CI_SKIP_SYSROOT: 1
-
-              WASI_SDK_CI_TOOLCHAIN_LLVM_CMAKE_ARGS: >-
-                -DCMAKE_C_COMPILER=aarch64-linux-gnu-gcc
-                -DCMAKE_CXX_COMPILER=aarch64-linux-gnu-g++
-                -DCMAKE_CROSSCOMPILING=True
-                -DCMAKE_CXX_FLAGS=-march=armv8-a
-                -DCMAKE_SYSTEM_PROCESSOR=arm64
-                -DCMAKE_SYSTEM_NAME=Linux
-                -DLLVM_HOST_TRIPLE=aarch64-linux-gnu
-                -DRUST_TARGET=aarch64-unknown-linux-gnu
 
           - artifact: arm64-macos
             os: macos-14