(feat): Re-enable FOSSA (#47860)

This PR re-enables FOSSA license compliance scans. The action has been
running for a few days now in all repos except `getsentry`, `snuba`, and
`sentry` without issues. Changes have been made to the action to make
sure it is more resilient to FOSSA errors (outages, network issues)

Here's the relevant PR in the license scan action:
getsentry/action-enforce-license-compliance#16

.github/workflows/enforce-license-compliance.yml

@@ -9,6 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Enforce License Compliance'
-        uses: getsentry/action-enforce-license-compliance@693b4f5a92ea8629db875f0226b05e8af43c95ae  # main
+        uses: getsentry/action-enforce-license-compliance@6599a041195852debba3417e069829060d671e76  # main
         with:
           fossa_api_key: ${{ secrets.FOSSA_API_KEY }}