Remove get-codeowners.ps1 from docs automation

[danieljurek]

Fixes #6461

This also requires changes to docs repos which remove the author and ms.author values written into individual markdown files and configures docfx.json to set default author and ms.author values for those files.

Required changes after this merges:

1. Remove credential params in docindex.yml for each language
2. Merge changes to docfx.json and removal of author metadata for each docs repo

Examples:

• Release (template)
  • Pipeline run -- https://dev.azure.com/azure-sdk/internal/_build/results?buildId=3131133&view=results
  • Metadata update (note the lack of author data, this is expected) -- MicrosoftDocs/azure-docs-sdk-node@76ceb18
• Docindex
  • Pipeline run -- https://dev.azure.com/azure-sdk/internal/_build/results?buildId=3130675&view=results
  • CI update (note the ms.date instead of ms.data and no author metadata) -- Azure/azure-docs-sdk-java@fef7e42
• Docs site (use view source and search for "author" and "ms.author" to see values specified in docfx.json)
  • Example service level overview -- https://review.learn.microsoft.com/en-us/javascript/api/overview/azure/advisor?view=azure-node-latest&branch=djurek%2Fauthor-metadata
  • Example package-level overview -- https://review.learn.microsoft.com/en-us/javascript/api/overview/azure/app-configuration-readme?view=azure-node-latest&branch=djurek%2Fauthor-metadata

[azure-sdk]

The following pipelines have been queued for testing:
java - template
java - template - tests
js - template
net - template
net - template - tests
python - template
python - template - tests
You can sign off on the approval gate to test the release stage of each pipeline.
See eng/common workflow

[azure-sdk]

The following pipelines have been queued for testing:
java - template
java - template - tests
js - template
net - template
net - template - tests
python - template
python - template - tests
You can sign off on the approval gate to test the release stage of each pipeline.
See eng/common workflow

[azure-sdk]

The following pipelines have been queued for testing:
java - template
java - template - tests
js - template
net - template
net - template - tests
python - template
python - template - tests
You can sign off on the approval gate to test the release stage of each pipeline.
See eng/common workflow

[azure-sdk]

The following pipelines have been queued for testing:
java - template
java - template - tests
js - template
net - template
net - template - tests
python - template
python - template - tests
You can sign off on the approval gate to test the release stage of each pipeline.
See eng/common workflow

[JimSuplizio]

Daniel,
As per our discussion over teams. I'm good with these changes. For anyone else, there was one requested change which was done with the 5th commit that fixed up the notification-configuration solution which, for some reason, opted to pull in the entire CodeownersParser solution instead of just the library's project like the other consumers do.