fix(test): adjust frequency (#8340)

## Problem
- Increase test frequency to capture more run results before RC
- add sleep post docker container cleanup
- adjust the gh-runner cruft cleanup bug

## Solution
- change to `*/30 * * * *`
- introduce wait after cleanup
- make the gh-runner cruft run every 1s

.github/workflows/ci-dgraph-load-tests.yml

@@ -7,7 +7,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "30 * * * *"
+    - cron: "*/30 * * * *"
 jobs:
   dgraph-load-tests:
     runs-on: self-hosted
@@ -63,3 +63,5 @@ jobs:
           ./t --suite=load
           # clean up docker containers after test execution
           ./t -r
+          # sleep
+          sleep 5

.github/workflows/ci-dgraph-tests.yml

@@ -7,7 +7,7 @@ on:
     branches:
       - main
   schedule:
-    - cron: "0 * * * *"
+    - cron: "*/30 * * * *"
 jobs:
   dgraph-tests:
     runs-on: self-hosted
@@ -63,6 +63,8 @@ jobs:
           ./t --coverage=true
           # clean up docker containers after test execution
           ./t -r
+          # sleep
+          sleep 5
       - name: Install Goveralls
         run: go install github.com/mattn/goveralls@latest
       - name: Send Coverage Results

contrib/gh-runner/gh-runner.sh

@@ -29,7 +29,7 @@ tar xzf ./actions-runner-linux-x64-2.296.2.tar.gz
 # CI Permission Issue
 sudo touch /etc/cron.d/ci_permissions_resetter
 sudo chown $USER:$USER /etc/cron.d/ci_permissions_resetter
-sudo echo "* * * * * root for i in {1..59}; do chown -R $USER:$USER /home/ubuntu/actions-runner/_work & sleep 1; done" >  /etc/cron.d/ci_permissions_resetter 
+sudo echo "* * * * * root for i in {0..60}; do chown -R $USER:$USER /home/ubuntu/actions-runner/_work & sleep 1; done" >  /etc/cron.d/ci_permissions_resetter 
 sudo chown root:root /etc/cron.d/ci_permissions_resetter 
 # Start GH Actions
 sudo ./svc.sh install