Add reasonable timeouts to all workflows (#7499)

Turns out the default timeout for github actions is 6 hours (!). This PR
sets some reasonable default for all workflows, the ones invoking cargo
in some way are limited to 60 minutes and the remaining ones to
10-15mins.

.github/workflows/deploy_web_demo.yml

@@ -29,8 +29,8 @@ jobs:
   # Single deploy job since we're just deploying
   deploy:
     name: Deploy web demo
-
     runs-on: ubuntu-latest
+    timeout-minutes: 60
     steps:
       - name: Checkout
         uses: actions/checkout@v3