CI: run jenkins as batman (#30184)

* I'm batman

* chown batman

* sudo

* add batman to sudo group

* try without cleanup

* Revert "try without cleanup"

This reverts commit f59554f2f373417f2c59fd250463eca2fda4d49e.

* comment

Jenkinsfile

@@ -81,10 +81,14 @@ def pcStage(String stageName, Closure body) {
 
     checkout scm
 
-    def dockerArgs = '--user=root -v /tmp/comma_download_cache:/tmp/comma_download_cache -v /tmp/scons_cache:/tmp/scons_cache';
+    def dockerArgs = '--user=batman -v /tmp/comma_download_cache:/tmp/comma_download_cache -v /tmp/scons_cache:/tmp/scons_cache';
     docker.build("openpilot-base:build-${env.GIT_COMMIT}", "-f Dockerfile.openpilot_base .").inside(dockerArgs) {
       timeout(time: 20, unit: 'MINUTES') {
         try {
+          // TODO: remove these after all jenkins jobs are running as batman (merged with master)
+          sh "sudo chown -R batman:batman /tmp/scons_cache"
+          sh "sudo chown -R batman:batman /tmp/comma_download_cache"
+
           sh "git config --global --add safe.directory '*'"
           sh "git submodule update --init --recursive"
           sh "git lfs pull"