[JENKINS-73305] Create .ssh directory with owner only permissions#1150

MarkEWaite wants to merge 3 commits into

jenkinsci:masterjenkinsci/git-client-plugin:masterfrom

MarkEWaite:create-ssh-dir-with-better-permsMarkEWaite/git-client-plugin:create-ssh-dir-with-better-permsCopy head branch name to clipboard