feat: adding to feature flag enum

[AAfghahi]

💔 Breaking Changes

🏆 Enhancements
We are adding a new feature flag for the dynamic form for adding and editing databases.

📜 Documentation

🐛 Bug Fix

🏠 Internal

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/superset/superset-ui/6XtciuGGCytdgnFyuXexSuXHGqnS
✅ Preview: https://superset-ui-git-fork-preset-io-featureflag-superset.vercel.app

[codecov]

Codecov Report

Merging #1142 (5827984) into master (2d0ae18) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1142   +/-   ##
=======================================
  Coverage   28.97%   28.97%           
=======================================
  Files         463      463           
  Lines        9310     9310           
  Branches     1486     1486           
=======================================
  Hits         2698     2698           
  Misses       6400     6400           
  Partials      212      212           

Impacted Files	Coverage Δ
...ackages/superset-ui-core/src/utils/featureFlags.ts	100.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2d0ae18...5827984. Read the comment docs.