Integrate project-switch-project with project-find-regexp

* lisp/progmodes/project.el:
(project-find-regexp): Add to the list of 'switch' commands.
(project-switch-project): Use call-interactively so that the
former can read its arguments.
1 job for scratch/project-switching in 36 minutes and 34 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
failed #5954
test-all

00:36:34

 
Name Stage Failure
failed
test-all Test
  ELC      calendar/todo-mode.elc
ELC cedet/cedet-cscope.elc
ELC cedet/cedet-files.elc
ELC cedet/cedet-global.elc
ELC cedet/cedet-idutils.elc
ELC cedet/cedet.elc
ELC cedet/data-debug.elc
ELC cedet/ede.elc
ERROR: Job failed: exit code 137