Merge bitcoin#24601: ci: add ci/scratch dir to .gitignore

7027595 add ci/scratch dir to gitignore (josibake)

Pull request description:

  Not sure if I'm missing some context as to why this isn't already ignored?

ACKs for top commit:
  hebasto:
    re-ACK 7027595, tested on Ubuntu 22.04.

Tree-SHA512: 1f13041cb27cd3687619105ac1bb3af4c31d000fcd98e5f84160c34649de532fcd8b98cb8a5bed0ba68e25b3bb344f669ea3567b9c9d86cf73386ddf276f292e

Author: MarcoFalke

.gitignore

@@ -163,6 +163,8 @@ dist/
 
 /guix-build-*
 
+/ci/scratch/
+
 # cppcheck cache-directory
 test/lint/.cppcheck/*