Don't be lazy when testing experimental features in CI

The diff in AssemblyScript#2720 showed that the fixtures for the bindings/raw and
bindings/esm tests are out of date. The reason why this is so and why CI
didn't complain is the same: these tests are almost always skipped. It
also seems like the list of features in ASC_FEATURES is out of date as
well, since it doesn't include simd and relaxed-simd. This patch ensures
the entire compiler test suite is now run with all features enabled, as
I don't think it's reasonable to expect everyone to keep CI in the back
of their minds while writing a new test.

Author: CountBleck

.github/workflows/test.yml

@@ -81,9 +81,9 @@ jobs:
       run: npm run build
     - name: Test experimental features
       env:
-        ASC_FEATURES: threads,reference-types,gc,exception-handling
+        ASC_FEATURES: "*"
       run: |
-        npm run test:compiler features/threads features/reference-types features/gc features/exception-handling
+        npm run test:compiler
   runtimes:
     name: "Runtimes"
     runs-on: ubuntu-latest