Add some more configuration errors

[henrymercer]

Add configuration errors for:

• Hitting API rate limits
• Deleting the branch before uploading SARIF to it, or specifying an invalid ref to start with
• Specifying an unsupported build mode

Merge / deployment checklist

• Confirm this change is backwards compatible with existing workflows.
• Confirm the readme has been updated if necessary.
• Confirm the changelog has been updated if necessary.

[aeisenberg]

My only concern with this one is that we have a bug in the action where we are inadvertently causing rate limits for the repository. I feel like this has happened in the past.

Is this error for an org/user or is it specific to the repository/

[henrymercer]

Most of the time the rate limit hits are legitimate, so this creates a level of noise that means we have a bunch of false positive monitor pings or have to raise our thresholds and miss genuine failures. My recommendation is we avoid the possibility of a bug in the Action as part of our monitoring for significant changes in configuration errors, which is intended to capture these errors that are noisy, but have signal in large numbers.