turn off GHA error messages for try catch earthly tests (#4169)

.github/workflows/reusable-misc-tests-1.yml

@@ -79,7 +79,7 @@ jobs:
       - name: Execute registry-certs test
         run: frontend=${{inputs.BINARY}} ./tests/registry-certs/test.sh
       - name: Execute try-catch test
-        run: ./tests/try-catch/test.sh
+        run: GITHUB_ACTIONS="" ./tests/try-catch/test.sh
       - name: Buildkit logs (runs on failure)
         run: ${{inputs.SUDO}} ${{inputs.BINARY}} logs earthly-buildkitd || true
         if: ${{ failure() }}