fix(ci): add draft check in the workflow yaml (#8396)

## Problem
Currently the tests runs on draft PR as well which is waste of
resources.

## Solution
Add a `if: ! github.event.pull_request.draft` check to prevent GH runs
on draft PRs. Reference:
https://stackoverflow.com/questions/68349031/only-run-actions-on-non-draft-pull-request

.github/workflows/ci-aqua-security-trivy-tests.yml

@@ -4,13 +4,19 @@ on:
     branches:
       - main
   pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
     branches:
       - main
   schedule:
     - cron: "0 * * * *"
 jobs:
   build:
     name: trivy-tests
+    if: github.event.pull_request.draft == false
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout code

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

@@ -4,12 +4,18 @@ on:
     branches:
       - main
   pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
     branches:
       - main
   schedule:
     - cron: "0 * * * *"
 jobs:
   dgraph-load-tests:
+    if: github.event.pull_request.draft == false
     runs-on: self-hosted
     steps:
       - uses: actions/checkout@v3

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

@@ -4,12 +4,18 @@ on:
     branches:
       - main
   pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
     branches:
       - main
   schedule:
     - cron: "0 * * * *"
 jobs:
   dgraph-tests:
+    if: github.event.pull_request.draft == false
     runs-on: self-hosted
     steps:
       - uses: actions/checkout@v3

.github/workflows/ci-golang-lint.yml

@@ -4,12 +4,18 @@ on:
     branches:
       - main
   pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
     branches:
       - main
   schedule:
     - cron: "0 * * * *"
 jobs:
   golang-lint:
+    if: github.event.pull_request.draft == false
     name: lint
     runs-on: ubuntu-latest
     steps: