revert: fourteen unverified desktop fixes from the takeover campaign#22222

Revert "fix(desktop): a slow PowerShell profile delays Windows startup by 5 s, not 10 (#19467)"

Revert "fix(desktop): skip auxiliary macOS snapshot windows (#12978)"

Revert "fix(desktop): an AppImage launch drops earlier launches' mount dirs from the server PATH (#18808)"

Revert "fix(desktop): register Windows OAuth callbacks with the app entry point (#15995)"

Revert "fix(desktop): allow half-screen tiling on scaled displays (#19232)"

Revert "fix(desktop): skip WSL distro probing while the WSL backend is off (#21225)"

Revert "fix(desktop): read Chromium cookies stored as text (#19377)"

Revert "fix(desktop): restart prompt returns after relaunching with a downloaded update (#18095)"

Revert "fix(desktop): capture fresh pixels from background previews (#19931)"

Revert "fix(desktop): avoid temporary icon copies on Linux launches (#19589)"

Revert "fix(desktop): retry a timed-out Windows update signature check once (#21273)"

Revert "fix(desktop): stop blocking the renderer during topology polling (#19300)"

Revert "perf(desktop): show connecting splash while the local backend starts (#19706)"

Revert "fix(desktop): let lifecycle shutdown finish before exiting (#20303)"