[PATCH] D106535: [clangd] Use CommandMangler in TestTU

[Fangrui Song via Phabricator via cfe-commits]

MaskRay added a comment.

`[clangd] Get rid of arg adjusters in CommandMangler` can crash `BuildCompilerInvocation.DropsPlugins`.

I am testing `ninja check-clangd` and will push the revert shortly.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D106535/new/

https://reviews.llvm.org/D106535