chore: Add sccache to workflows

Author: jamie-osec

.github/workflows/reusable-tests.yaml

@@ -30,6 +30,10 @@ env:
     ~/.cargo/registry/cache/
     ~/.cargo/git/db/
     ./target/
+  # Allow sccache to work
+  CARGO_INCREMENTAL: "false"
+  SCCACHE_GHA_ENABLED: "true"
+  RUSTC_WRAPPER: "sccache"
 
 jobs:
   test-core:
@@ -492,6 +496,9 @@ jobs:
           path: ${{ matrix.node.path }}/target
           key: cargo-${{ runner.os }}-${{ matrix.node.path }}-${{ env.ANCHOR_VERSION }}-${{ env.SOLANA_CLI_VERSION }}-${{ hashFiles('**/Cargo.lock') }}
 
+      - name: Run sccache-cache
+        uses: mozilla-actions/sccache-action@v0.0.9
+
       - run: ${{ matrix.node.cmd }}
         name: ${{ matrix.node.path }} program test