chore: set env-test timeout (#4120)

- chore: set env-test timeout
- to avoid machines spinning idly for hours/days in jobs like this
https://github.com/hyperlane-xyz/hyperlane-monorepo/actions/runs/9872063807/job/27261501530?pr=3888#step:6:44

---------

Signed-off-by: pbio <10051819+paulbalaji@users.noreply.github.com>

.github/workflows/test.yml

@@ -404,6 +404,7 @@ jobs:
 
   env-test:
     runs-on: ubuntu-latest
+    timeout-minutes: 3
     needs: [yarn-build]
     strategy:
       fail-fast: false