Remove export command and backing code

[adamsachs]

Partially closes https://github.com/ethyca/fidesplus/issues/879

Code Changes

• remove export CLI command and backing code in export.py and export_helpers.py (it will be moved over to fidesplus)
• remove automated tests for that code (also will be moved over to fidesplus)
• make some adjustments to existing tests that needed them

Steps to Confirm

• confirm that fides export no longer works in core fides with this change (should be an unrecognized command)
• confirm that on the fidesplus side (see open PR here), fides export command does work as expected
• confirm on the fidesplus side that datamap UI still works as expected

Pre-Merge Checklist

• All CI Pipelines Succeeded
• Documentation:
  • documentation complete, PR opened in fidesdocs
  • documentation issue created in fidesdocs
• Issue Requirements are Met
• Relevant Follow-Up Issues Created
• Update CHANGELOG.md
• For API changes, the Postman collection has been updated

Description Of Changes

See fidesplus issue for context/motivation behind this migration

[cypress]

Passing run #2141 ↗︎

0	4	0	0	0
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Details:

Merge 0271d27 into db00d84...
Project: fides	Commit: 530b928a7f ℹ️
Status: Passed	Duration: 00:47 💡
Started: May 24, 2023 12:58 PM	Ended: May 24, 2023 12:59 PM

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.18 🎉

Comparison is base (db00d84) 87.03% compared to head (0271d27) 87.21%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3256      +/-   ##
==========================================
+ Coverage   87.03%   87.21%   +0.18%     
==========================================
  Files         314      311       -3     
  Lines       19014    18586     -428     
  Branches     2474     2368     -106     
==========================================
- Hits        16549    16210     -339     
+ Misses       2021     1960      -61     
+ Partials      444      416      -28     

Impacted Files	Coverage Δ
src/fides/cli/__init__.py	92.15% <ø> (-0.16%)	⬇️

... and 2 files with indirect coverage changes

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[ThomasLaPiana]

discussion in slack for removal vs. deprecation: link

[adamsachs]

created #3264 for deprecation instead of removal. created #3265 to track removal.

if we're good with this approach, i'll mark this PR as "do not merge" until we're ready to officially remove the command in the subsequent release.

[adamsachs]

@ThomasLaPiana @SteveDMurphy this should be a straightforward one, assuming we're good to remove this in 2.14.0 now that it was included with the deprecation warning in 2.13.0. if we'd prefer to hold off for another release that's OK with me, from my POV we're good to knock this out now.

[ThomasLaPiana]

@ThomasLaPiana @SteveDMurphy this should be a straightforward one, assuming we're good to remove this in 2.14.0 now that it was included with the deprecation warning in 2.13.0. if we'd prefer to hold off for another release that's OK with me, from my POV we're good to knock this out now.

@NevilleS you comfortable with removing this after official deprecation for a release?

My gut feeling is yes, but we also don't know who's potentially using this. Worst-case they can fork and re-implement?

[NevilleS]

Yup, let's do it 👍

[adamsachs]

@ThomasLaPiana do the code changes (removals) look alright to you? just need a ✅ before i can merge this in!

[ThomasLaPiana]

@adamsachs oh gotcha, let me take a look!

[ThomasLaPiana]

@adamsachs i got two more little ones hiding, I think this is good to go now! Approving but we can wait for the PR checks to be sure