Expand extraction service to more connectors #4

[navarone-feekery]

Related to https://github.com/elastic/enterprise-search-team/issues/5857

• Expand extraction service to more connectors:
  • github
  • outlook
  • sharepoint server
  • zoom

Review notes:
There are also a few small bug fixes and removal of obsolete code in this PR, which has added many files to the diff.
For connectors that aren't in the list above, the only changes should be removal of obsolete code or small bug fixes.

Checklists

Pre-Review Checklist

• this PR has a meaningful title
• this PR links to all relevant github issues that it fixes or partially addresses
• if there is no GH issue, please create it. Each PR should have a link to an issue
• this PR has a thorough description
• Covered the changes with automated tests
• Tested the changes locally
• Added a label for each target release version (example: v7.13.2, v7.14.0, v8.0.0)
• Considered corresponding documentation changes
• Contributed any configuration settings changes to the configuration reference

Related Pull Requests

• Abstract download file extraction and conversion #1685
• Expand extraction service to more connectors #2 #1693
• Expand extraction service to more connectors #3 #1694

[vidok]

Great work!

[leonmeijer]

Any plans for the network drive connector?

[danajuratoni]

Hi @leonmeijer, adding Extraction Service support for Network Drive is on the roadmap, but not the immediate roadmap. Here's a ticket you can follow for progress or you can even give customizing the connector a try and add support as a community member. Community contributions would be amazing!

[pezzking]

we are also desperately waiting for the network drive external extraction support, hoping you would give more priority to this one