chore: Disable scccache on CI

Seems to cause CI errors due to mozilla/sccache#1674

.github/workflows/rust.yml

@@ -15,7 +15,7 @@ jobs:
       CRATE_NAME: gluon
       CARGO_INCREMENTAL: 0 # Incremental compilation is slower and bloats the cache
       RUST_BACKTRACE: 1
-      RUSTC_WRAPPER: sccache
+      # RUSTC_WRAPPER: sccache
       SCCACHE_CACHE_SIZE: 500M
     steps:
     - name: Checkout repository
@@ -30,13 +30,13 @@ jobs:
       uses: hecrj/setup-rust-action@v1
       with:
         rust-version: ${{ matrix.rust }}
-    - uses: Swatinem/rust-cache@v1
+    - uses: Swatinem/rust-cache@v2
     - run: echo "$HOME/bin" >> $GITHUB_PATH
     - run: mkdir -p $HOME/bin
     - name: Setup tools
       if: steps.cache.outputs.cache-hit != 'true'
       run: |
-          ./scripts/install_sccache.sh $TARGET
+          # ./scripts/install_sccache.sh $TARGET
           source ~/.cargo/env || true
           ./scripts/install_mdbook.sh $TARGET
     - name: Run tests