* Allow the codeql-action to be run locally
This change allows the codeql-action to be run locally through
[act](https://github.com/nektos/act).
In order to run the action locally, you need to do two things:
1. Add the `CODEQL_LOCAL_RUN: true` environment variable. The only way
I could figure out how to do this was to add it directly in the
workflow file in an `env` block. It _should_ be possible to add it
through a `.env` file and pass it to `act`, but I couldn't get it
working.
2. Run this command `act -j codeql -s GITHUB_TOKEN=<MY_PAT>`
Setting the `CODEQL_LOCAL_RUN` env var will fill in missing env vars
that the action needs, but isn't set by `act`. It will also avoid
making api calls to github that would fail locally.
This is a refactoring discussed in
https://github.com/github/dsp-codeql/issues/36
