The 'Add #include' code action incorrectly uses "../" instead of <> when an includePath is used that is lexicographically less than the source file's parent directory

[sean-mcmanus]

See the 2 screenshots: If the includePath has "${workspaceFolder}/a" then the bug repros,

but with "${workspaceFolder}/t" it behaves correctly -- t is lexicographically greater than the source's parent directory "sub".

Tests added for #11989 caused this to start to be hit (after a lexigraphically smaller includePath was added).

[AlexandraKemperMS]

Also repos for me when removing the algorithms library from the ship.cpp file in endless sky (https://github.com/endless-sky/endless-sky/blob/master/source/Ship.cpp) and adding a call to transform:

[sean-mcmanus]

I got a repro with a our internal test project (add_missing_include test folder).