ci: major overhaul

- Simplify some workflow steps and auxiliary scripts
- Build library using cmake when not cross-compiling
- Try to fetch fixtures from cache first
- Use `actions-rust-lang/setup-rust-toolchain`

.github/workflows/sanitize.yml

@@ -8,39 +8,44 @@ on:
   workflow_call:
 
 jobs:
-  check_undefined_behaviour:
-    name: Sanitizer checks
+  check-undefined-behaviour:
     runs-on: ubuntu-latest
     timeout-minutes: 20
     env:
       TREE_SITTER: ${{ github.workspace }}/target/release/tree-sitter
     steps:
-    - name: Checkout source code
-      uses: actions/checkout@v4
+      - name: Checkout repository
+        uses: actions/checkout@v4
 
-    - name: Install UBSAN library
-      run: sudo apt-get update -y && sudo apt-get install -y libubsan1
+      - name: Install UBSAN library
+        run: sudo apt-get update -y && sudo apt-get install -y libubsan1
 
-    - run: rustup toolchain install stable --profile minimal
-    - uses: Swatinem/rust-cache@v2
-    - run: cargo build --release
-    - run: cargo xtask fetch-fixtures
+      - name: Set up Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1
 
-    - uses: ./.github/actions/cache
-      id: cache
+      - name: Build project
+        run: cargo build --release
 
-    - if: ${{ steps.cache.outputs.cache-hit != 'true' }}
-      run: cargo xtask generate-fixtures
+      - name: Cache fixtures
+        uses: ./.github/actions/cache
+        id: cache
 
-    - name: Run main tests with undefined behaviour sanitizer (UBSAN)
-      env:
-        CFLAGS: -fsanitize=undefined
-        RUSTFLAGS: ${{ env.RUSTFLAGS }} -lubsan
-      run: cargo test -- --test-threads 1
+      - name: Fetch fixtures
+        run: cargo xtask fetch-fixtures
 
-    - name: Run main tests with address sanitizer (ASAN)
-      env:
-        ASAN_OPTIONS: verify_asan_link_order=0
-        CFLAGS: -fsanitize=address
-        RUSTFLAGS: ${{ env.RUSTFLAGS }} -lasan --cfg sanitizing
-      run: cargo test -- --test-threads 1
+      - name: Generate fixtures
+        if: ${{ steps.cache.outputs.cache-hit != 'true' }}
+        run: cargo xtask generate-fixtures
+
+      - name: Run main tests with undefined behaviour sanitizer (UBSAN)
+        run: cargo test -- --test-threads 1
+        env:
+          CFLAGS: -fsanitize=undefined
+          RUSTFLAGS: ${{ env.RUSTFLAGS }} -lubsan
+
+      - name: Run main tests with address sanitizer (ASAN)
+        run: cargo test -- --test-threads 1
+        env:
+          ASAN_OPTIONS: verify_asan_link_order=0
+          CFLAGS: -fsanitize=address
+          RUSTFLAGS: ${{ env.RUSTFLAGS }} -lasan --cfg sanitizing