add endpoint for clearing drupal cache (+merge previous commits)

4 jobs for 1.2.7 in 3 minutes and 17 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed test #83236

00:01:24

passed test-chart #83235
mbr

00:00:15

 
  Publish
passed build-tagged-image #83237
mbr

00:01:52

passed publish-chart #83238
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00:00:16