[ci][hermes] Run integration tests

.github/workflows/hermes.yml

@@ -62,10 +62,22 @@ jobs:
         working-directory: tools/hermes
         run: cargo run --bin cargo-hermes -- setup
 
-      - name: Run tests
+      # Run unit tests separately, as they're much less likely to have bugs
+      # during local development, and this makes the GitHub Actions output
+      # easier to skim (in particular, it's clear at a glance whether a failure
+      # is due to unit or integration tests).
+      - name: Run unit tests
         working-directory: tools/hermes
         run: cargo test --verbose --bin cargo-hermes
 
+      # We duplicate running unit tests since they're very cheap compared to
+      # integration tests, and this way it's easier to be sure that we run all
+      # tests instead of specifically trying to carve out unit tests and risk
+      # missing test categories.
+      - name: Run all tests
+        working-directory: tools/hermes
+        run: cargo test --verbose
+
   # Used to signal to branch protections that all other jobs have succeeded.
   all-jobs-succeed:
       # WARNING: This name is load-bearing! It's how GitHub's settings UI configures which jobs