Add CodeQL support

[davidmrdavid]

CodeQL (Code Query Language?) is a service that checks against CVEs and other compliance requirements using static analysis in our repos. It needs to be executed weekly.

Our 1ES pipeline already has this, but we need to make it run weekly, so our 1ES pipeline now has a weekly schedule.
We also need to add it directly on GitHub, which is done through the codeQL.yml GitHub workflow.

In addition, our open telemetry sample was throwing a warning because there was an async method nor await'ing anything. I've made the method synchronous to make the warning go away. See: 8d2223a

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.

[cgillum]

@davidmrdavid do the development branches still need to be removed?

[davidmrdavid]

Yes, I'll remove this in a follow up PR, totally blanked out, my mistake