fix or remove all broken links

[agilgur5]

Summary

• dc7c5b0 broke a decent amount of links
  • they were replaced with "Broken link" and "broken-reference"
  • due to either moving docs around/renaming, or because the docs no longer exist

Details

• fix Airflow reference in README

• fix Non-SQL reference in Porting a Workflow

• fix Conda reference in Operators

• fix Data Systems reference in Quickstart Guide

• fix Compute Systems reference in Creating a Workflow

• remove references to Aqueduct Metadata Store

  • the page on it was removed in dc7c5b0
  • links to it were removed in dc7c5b0#diff-649d189a8231566360ee2e0c865d203c86b590987d36383cebce29b06c3d7e2dL8 and dc7c5b0#diff-4f74b24c8cd7466c1c46dc972d8e284ed47091160afda95a432cc000f2eceb4aL99

• remove reference to non-pip connector dependency installation in CLI

  • the page was removed in dc7c5b0
  • the code seems to definitely still do this though, so maybe it should be added back under Data Systems?

Review Notes

I'm not actually sure what to do about the removals:

• Does the Metadata Store still exist? Not sure if it got integrated into all Data Systems? Could be added back under Data Systems?
• Should the non-pip deps page be added back in a different place?