Make branches sortable without push permission

What does this MR do?

Make branches on the branches page sortable without push permission.

Why was this MR needed?

Sorting branches (a readonly action) required push permission which does not make sense.

What are the relevant issue numbers?

fixes #18678 (closed)

Screenshots

Before

After

Added 1 commit:

• 005ffccd - Make branches sortable without push permission (!5462 (merged))

@iamphill You already fixed this in !4179 (closed) but the corresponding issue #3341 (closed) was closed. Can you review please? 😃

Restored source branch sortable-branches-push-permission

Added 1 commit:

• 4946c238 - 1 commit from branch gitlab-org:master

LGTM! 👍

Reassigned to @fatihacet

Added 37 commits:

• 005ffccd...9fead2b8 - 36 commits from branch gitlab-org:master
• f44b11ce - Make branches sortable without push permission (!5462 (merged))

Reassigned to @winniehell

Added 46 commits:

• f44b11ce...0c799be6 - 45 commits from branch gitlab-org:master
• 21209a87 - Make branches sortable without push permission (!5462 (merged))

Reassigned to @fatihacet

Enabled an automatic merge when the build for 21209a87 succeeds

Enabled auto merge, tested on my local and works good. Thanks @winniehell 👍

Status changed to merged

mentioned in commit 39ed6290

mentioned in commit 21209a87

mentioned in commit a1f08a76

Mentioned in commit 21209a87

Mentioned in commit a1f08a76