Refactor dispatcher project branches create path

What does this MR do?

Refactor dispatcher project branches create path

Are there points in the code the reviewer needs to double check?

None

Why was this MR needed?

~performance

Screenshots (if relevant)

None

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/41341

changed the description

unmarked as a Work In Progress

changed the description

added ~127616 bugperformance labels

changed milestone to %10.5

EE: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/4012

mentioned in issue #41341 (closed)

added 186 commits

• acefbad2...b5cde6b6 - 184 commits from branch master
• 15f10ec0 - Merge branch 'master' into dispatcher-branches-create
• e4335a1a - Fix eslint so that pipeline doesnt fail after mege

Compare with previous version

@iamphill can you review?

assigned to @iamphill

assigned to @ClemMakesApps

added 1 commit

• 4d5fdc1c - Remove unused create index.js

Compare with previous version

assigned to @iamphill

resolved all discussions

approved this merge request

merged

mentioned in commit 598d81cd