Add machete CI job now that machete allows whitelisting false positives

.github/workflows/lint.yml

@@ -75,3 +75,12 @@ jobs:
       - name: Verify Dockerfiles are up to date
         # Runs the file which generates them and checks the diff has no lines
         run: cd orchestration && ./dockerfiles.sh && git diff | wc -l | grep -x "0"
+
+  machete:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac
+      - name: Verify all dependencies are in use
+        run: |
+          cargo install cargo-machete
+          cargo machete