vim: Fix change surround adding unwanted spaces with quotes

[Kalmaegi]

Update Vim.change_surround in order to ensure that there's no
overlapping edits by keeping track of where the open string range ends
and ensuring that the closing string range start does not go lower than
the open string range end.

Closes #42316

Release Notes:

• Fix vim's change surrounds cs inserting spaces with quotes by preventing overlapping edits

[Kalmaegi]

Sorry, my computer is a bit slow. I’ll run the tests locally and submit once they pass.

[dinocosta]

Thank you for fixing this @Kalmaegi ! I've pushed a commit to refactor it a bit, as we can simply keep track of where the opening range ends and ensuring that we stop before we go under that value when building the closing edit range 🙂