Add testing for Arm64EC Windows

Author: dpaoliello

.github/workflows/main.yml

@@ -78,8 +78,8 @@ jobs:
         #  os: ubuntu-latest
         #- tuple: mipsel-unknown-linux-musl
         #  os: ubuntu-latest
-        - tuple: s390x-unknown-linux-gnu
-          os: ubuntu-latest
+        # - tuple: s390x-unknown-linux-gnu
+        #   os: ubuntu-latest
         - tuple: i586-unknown-linux-gnu
           os: ubuntu-latest
         - tuple: nvptx64-nvidia-cuda
@@ -117,6 +117,8 @@ jobs:
           os: windows-2025
         - tuple: aarch64-pc-windows-msvc
           os: windows-11-arm
+        - tuple: arm64ec-pc-windows-msvc
+          os: windows-11-arm
         - tuple: x86_64-pc-windows-gnu
           os: windows-2025
         # - tuple: i686-pc-windows-gnu
@@ -165,10 +167,10 @@ jobs:
             tuple: riscv64gc-unknown-linux-gnu
             os: ubuntu-latest
           test_everything: true
-        - target:
-            tuple: s390x-unknown-linux-gnu
-            os: ubuntu-latest
-          test_everything: true
+        # - target:
+        #     tuple: s390x-unknown-linux-gnu
+        #     os: ubuntu-latest
+        #   test_everything: true
         - target:
             tuple: x86_64-unknown-linux-gnu
             os: ubuntu-latest
@@ -207,14 +209,6 @@ jobs:
         rustup update nightly --no-self-update
         rustup default nightly
       shell: bash
-      if: matrix.target.os != 'windows-11-arm'
-    - name: Install Rust for `windows-11-arm` runners
-      # The arm runners don't have Rust pre-installed (https://github.com/actions/partner-runner-images/issues/77)
-      run: |
-        curl https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly
-        echo "$HOME/.cargo/bin" >> $GITHUB_PATH
-      shell: bash
-      if: matrix.target.os == 'windows-11-arm'
 
     - run: rustup target add ${{ matrix.target.tuple }}
       shell: bash