Release workflow: Allow manual trigger, use aarch64 for macos (#123)

Release workflow was failing to compile and upload binaries.
Changes:
- Use ARM, since this is what most people use now on MacOS
- Allow manual triggering of workflow, so we can attach binaries to the
existing v0.9.0 release
- Install required dependencies

Author: skunert

.github/workflows/build-release-binaries.yaml

@@ -4,14 +4,20 @@ on:
   release:
     types:
       - created
+  workflow_dispatch:
+    inputs:
+      release_tag:
+        description: 'Release tag to attach binaries to (e.g., v0.9.0)'
+        required: true
+        type: string
 
 jobs:
   build_and_upload:
     strategy:
       matrix:
         platform:
           - { os: ubuntu-latest, target: x86_64-unknown-linux-musl }
-          - { os: macos-latest, target: x86_64-apple-darwin }
+          - { os: macos-latest, target: aarch64-apple-darwin }
 
     runs-on: ${{ matrix.platform.os }}
 
@@ -34,7 +40,7 @@ jobs:
 
       - name: Add apple target
         if: matrix.platform.os == 'macos-latest'
-        run: rustup target add x86_64-apple-darwin
+        run: rustup target add aarch64-apple-darwin
 
       - name: Add musl target
         if: matrix.platform.os == 'ubuntu-latest'
@@ -47,13 +53,30 @@ jobs:
           sudo apt-get install -y musl-tools clang build-essential curl llvm-dev libclang-dev linux-headers-generic libsnappy-dev liblz4-dev libzstd-dev libgflags-dev zlib1g-dev libbz2-dev
           sudo ln -s /usr/bin/g++ /usr/bin/musl-g++
 
+      - name: Install deps for macOS build
+        if: matrix.platform.os == 'macos-latest'
+        run: |
+          brew install llvm
+          echo "LIBCLANG_PATH=$(brew --prefix llvm)/lib" >> $GITHUB_ENV
+        env:
+          HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: 1
+
       - name: Build Rust project
         run: cargo build --release --target ${{ matrix.platform.target }}
 
+      - name: Get release upload URL
+        id: get_release
+        if: github.event_name == 'workflow_dispatch'
+        run: |
+          UPLOAD_URL=$(gh api repos/${{ github.repository }}/releases/tags/${{ inputs.release_tag }} --jq '.upload_url')
+          echo "upload_url=$UPLOAD_URL" >> $GITHUB_OUTPUT
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Upload Binary to Release
         uses: actions/upload-release-asset@v1
         with:
-          upload_url: ${{ github.event.release.upload_url }}
+          upload_url: ${{ github.event.release.upload_url || steps.get_release.outputs.upload_url }}
           asset_path: ./target/${{ matrix.platform.target }}/release/try-runtime
           asset_name: try-runtime-${{ matrix.platform.target }}
           asset_content_type: application/octet-stream