Ignore .dir-locals-2.el files more

* lisp/emacs-lisp/shadow.el (load-path-shadows-find):
* lisp/emacs-lisp/bytecomp.el (byte-recompile-directory): Ignore
.dir-locals-2.el, too (bug#23257).
8 jobs for master in 1 minute and 16 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Prep Images
failed #22808
prep-image-base

00:01:16

 
  Build Images
skipped #22809
build-image-inotify
 
  Platform Images
skipped #22810
build-image-filenotify-gio
skipped #22811
build-image-gnustep
 
  Platforms
skipped #22812
test-filenotify-gio
skipped #22813
test-gnustep
 
  Native Comp Images
skipped #22814
build-native-bootstrap-speed0
 
  Slow
skipped #22815
test-all-inotify
 
Name Stage Failure
failed
prep-image-base Prep Images There has been a runner system failure, please try again
Initialized empty Git repository in /builds/emacs/emacs/.git/
Created fresh repository.
From https://emba.gnu.org/emacs/emacs
* [new ref] ed15f3954c04e2039a565ca0d0ff810519da8197 -> refs/pipelines/11295
* [new branch] master -> origin/master
Checking out ed15f395 as master...

Skipping Git submodules setup
ERROR: Job failed (system failure): Error response from daemon: Conflict. The container name "/runner-2oEDrUT7-project-1-concurrent-1-build-4" is already in use by container "f46df44a43bee1f61a6ede2eac732a4e06eaa2094659f7ea23718f093d67bcc6". You have to remove (or rename) that container to be able to reuse that name. (executor_docker.go:726:0s)