stop running post-merge builds for translations
stop running post-merge builds for translations

refs DE-1351
flag=none

TEST PLAN:
  Build

Change-Id: I85bb0c77820551bbbaf12e3d46b4b664897dcb64
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/299194
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Aaron Ogata <11ccf682c06d1508642f943a3962a1c3d00b8e44@instructure.com>
Build-Review: Aaron Ogata <11ccf682c06d1508642f943a3962a1c3d00b8e44@instructure.com>
QA-Review: Bobby Buten <5d364bfede2bfc09ec31d2e6ed3a4d111d37200d@instructure.com>
Product-Review: Bobby Buten <5d364bfede2bfc09ec31d2e6ed3a4d111d37200d@instructure.com>

sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms