Use a GitHub action for publishing source maps to Azure Artifacts symbol server

[zoherghadyali]

From Step 3: Publish source maps to the Azure Artifacts symbol server, developers currently have 2 ways to publish source maps to Azure Artifacts symbol server:

1. Using Azure DevOps Pipelines
2. Using symbol.exe

We should add a third way that makes use of GitHub actions. There is an Azure NPM Publish action for precedent as well that publishes NPM packages into Azure Artifacts. We would be doing something similar with sourcemaps that we'd then publish to Azure Artifacts symbol server.

AB#38455080

[captainbrosset]

Seems very useful indeed. Also relevant: issue #5 which is about collecting feedback about the using the Azure Artifacts symbol server for retrieving source maps from devtools.