Add codeql security analysis workflow to the repo (#1339)

* Add codeql security analysis workflow to the repo

Adds Github's security scanner to the workflows 

https://github.blog/2020-09-30-code-scanning-is-now-available/

* Only scan Go

Only scan Go files for better performance

* Remove on pull_request, and extra branch

* Remove names, and extra comments

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,46 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ main ]
+  schedule:
+    - cron: '22 18 * * 0'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+
+    steps:
+    - uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - uses: github/codeql-action/analyze@v1