feat: Add command for Edge V2 migration

[khvn26]

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Changes

This adds a migrate_to_edge_v2 management command that migrated all unmigrated projects to Edge V2.

How did you test this code?

Added a unit test.

[vercel]

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3 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		Jul 29, 2024 6:31pm
flagsmith-frontend-preview	⬜️ Ignored (Inspect)	Visit Preview		Jul 29, 2024 6:31pm
flagsmith-frontend-staging	⬜️ Ignored (Inspect)	Visit Preview		Jul 29, 2024 6:31pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api:pr-4415	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4415	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4415	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api-test:pr-4415	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-4415	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-4415	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4415	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-4415	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4415	Finished ✅	Results ✅

[github-actions]

Uffizzi Preview deployment-54759 was deleted.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.84%. Comparing base (c10e012) to head (66723c8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4415   +/-   ##
=======================================
  Coverage   96.84%   96.84%           
=======================================
  Files        1166     1169    +3     
  Lines       38676    38696   +20     
=======================================
+ Hits        37454    37474   +20     
  Misses       1222     1222           

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