Allow both global and log-level tags

[ephemer]

We have the need for global / configuration-level tags and log-level tags. In the current implementation that is not possible, because the per-log ddtags are ignored if ddtags is also sent as a property of params on the http request to the datadog API. That appears to be an issue with the API that we need to work around here.

I have tested this manually but will add unit tests if possible before submitting for review (hence the draft status). I will also look at updating the documentation when I do that.

Checklist

• [ ] run npm run test
• [ ] tests and/or benchmarks are included
• [ ] documentation is changed or added
• [ ] commit message and code follows Code Of Conduct

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.