fix: handle paths with special characters in injectQuery (fix #2585)

[GrygrFlzr]

Fixes regression introduced by #2435.

Details

• Unlike the original code which uses url.parse, both new URL() and pathToFileURL will percent-encode path names.
• new URL() will not percent-encode the % character, whereas pathToFileURL will percent-encode the % character.
• In order to keep their behavior consistent, we manually replace % with %25 before passing it to new URL(), but we pass the raw path to pathToFileURL.
• String.prototype.replaceAll is a relatively new API and only added to Node 15.0.0, so we're forced to use String.prototype.replace with a global regex modifier instead.
• To prevent future regressions, tests were added for a number of edge cases, including part of the original issue solved by fix: Improve injectQuery path handling (fix #2422) #2435.

I'm super unhappy about the manual replace but I can't think of a better way to keep the behavior between new URL() and pathToFileURL consistent.