Add upload native runtime workflow

.github/workflows/upload-native-runtime.yml

@@ -0,0 +1,30 @@
+name: Upload Native Runtime
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Add llvm deb repo
+      uses: myci-actions/add-deb-repo@10
+      with:
+        repo: deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-18 main
+        repo-name: llvm-repo
+        keys-asc: https://apt.llvm.org/llvm-snapshot.gpg.key
+    - name: Install deps
+      shell: bash
+      run: |
+        sudo apt-get install llvm-18 llvm-18-dev llvm-18-runtime clang-18 clang-tools-18 lld-18 libpolly-18-dev libmlir-18-dev mlir-18-tools
+        sudo apt install -y libgmp3-dev
+    - name: Checkout cairo_native
+      uses: actions/checkout@v4
+      with:
+        repository: lambdaclass/cairo_native
+        ref: 66e9b5e053faf3b2a9129de5b15205d1cfe686eb
+    - name: Build Cairo Native Runtime Library
+      shell: bash
+      run: make runtime
+    - name: Upload Cairo Native Runtime Library
+      uses: actions/upload-artifact@v4
+      with:
+        name: cairo_native_runtime_library
+        path: libcairo_native_runtime.a