V8: Enable as unstable, add syscalls, flesh out call_reducer, etc.

.github/workflows/ci.yml

@@ -168,6 +168,9 @@ jobs:
       - uses: dsherret/rust-toolchain-file@v1
       - run: echo ::add-matcher::.github/workflows/rust_matcher.json
 
+      - name: Run bindgen tests
+        run: cargo test -p spacetimedb-codegen
+
       # Make sure the `Cargo.lock` file reflects the latest available versions.
       # This is what users would end up with on a fresh module, so we want to
       # catch any compile errors arising from a different transitive closure
@@ -180,8 +183,6 @@ jobs:
       - name: Build module-test
         run: cargo run -p spacetimedb-cli -- build --project-path modules/module-test
 
-      - name: Run bindgen tests
-        run: cargo test -p spacetimedb-codegen
 
   publish_checks:
     name: Check that packages are publishable