Transform null names to an empty string before submission

[allisonking]

FE fix to get around #3682

Description Of Changes

#3571 refactored the privacy declaration form a bit so that we could include cookies fields. As part of that, there was a change where we only transformed the declaration was being edited, whereas previously we had transformed all declarations prior to submission.

This PR restores doing an additional transform to all declarations right before sending to the API.

Code Changes

• Add one more transform function

Steps to Confirm

• Run nox -s fides_env -- prod
• On one of the existing systems that already has a data use, try to add another data use
• You should be able to add one without getting any errors

Pre-Merge Checklist

• All CI Pipelines Succeeded
  * [ ] Issue Requirements are Met --> no they are not! but this is a smaller FE workaround
• Update CHANGELOG.md

[adamsachs]

manually tested locally and looks good, nice work on the super speedy patch!!!

[cypress]

Passing run #2913 ↗︎

0	4	0	0	0
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Details:

Merge 00ae922 into 3a4798f...
Project: fides	Commit: bf556ea9b5 ℹ️
Status: Passed	Duration: 01:11 💡
Started: Jun 26, 2023 8:59 PM	Ended: Jun 26, 2023 9:00 PM

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