chore(ci): add aarch64 linux runner

Linux arm64 hosted runners is in public preview.
Enable and see if is is something we can have now.

https://github.blog/changelog/2025-01-16-linux-arm64-hosted-runners-now-available-for-free-in-public-repositories-public-preview/

.github/workflows/main.yml

@@ -130,6 +130,14 @@ jobs:
           os: ubuntu-latest
           rust: nightly
           other: i686-unknown-linux-gnu
+        - name: Linux aarch64 stable
+          os: ubuntu-24.04-arm
+          rust: stable
+          other: x86_64-unknown-linux-gnu
+        - name: Linux aarch64 nightly
+          os: ubuntu-24.04-arm
+          rust: nightly
+          other: x86_64-unknown-linux-gnu
         - name: macOS aarch64 stable
           os: macos-14
           rust: stable
@@ -167,7 +175,7 @@ jobs:
     - run: rustup component add rustc-dev llvm-tools-preview rust-docs
       if: startsWith(matrix.rust, 'nightly')
     - run: sudo apt update -y && sudo apt install lldb gcc-multilib libsecret-1-0 libsecret-1-dev -y
-      if: matrix.os == 'ubuntu-latest'
+      if: matrix.os == 'ubuntu-latest' || matrix.os == 'ubuntu-24.04-arm'
     - run: rustup component add rustfmt || echo "rustfmt not available"
     - name: Configure extra test environment
       run: echo CARGO_CONTAINER_TESTS=1 >> $GITHUB_ENV