docs: Render OpenAPI content into md document, remove generated ymls from git (DEV-3443)

[seakayone]

Pull Request Checklist

Task Description/Number

Fix the [OAD…] markdown directive to point to the right file for rendering in dsp-docs for https://docs.dasch.swiss.
Screenshot of the current faulty state.

Remove the generated yaml from git because it will be generated in dsp-docs.

Needed for dasch-swiss/dsp-docs#114

PR Type

• build/chore: maintenance tasks (no production code change)
• docs: documentation changes (no production code change)
• feat: represents new features
• fix: represents bug fixes
• perf: performance improvements
• refactor: represents production code refactoring
• test: adding or refactoring tests (no production code change)
• deprecated: Deprecation warning (ideally referencing a migration guide)

Basic requirements for bug fixes and features

• Tests for the changes have been added
• Docs have been added / updated

Does this PR introduce a breaking change?

• Yes

[linear]

DEV-3443 docs.dasch.swiss: openapi docs of ingest have an outdated title

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.40%. Comparing base (a622e4f) to head (a464382).
Report is 76 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3254       +/-   ##
===========================================
+ Coverage   13.22%   83.40%   +70.18%     
===========================================
  Files         270      280       +10     
  Lines       22244    23092      +848     
===========================================
+ Hits         2941    19261    +16320     
+ Misses      19303     3831    -15472     

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