renderer/native: Discard page flip retries when rebuilding views

Rebuilding views means we don't care to retry page flip attempts for
previous views, especially since connectors may have been disconnected,
making a page flip retry hit an assert a flipped CRTC has connectors
associated with it.

Fixes: GNOME/mutter#619

GNOME/mutter!630
4 jobs for !630 with wip/discard-page-flip-retries-on-hot-plug in 6 minutes and 40 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Review
passed #331032
check-commit-log

00:00:29

 
  Build
passed #331033
build-mutter

00:03:22

 
  Test
passed #331035
can-build-gnome-shell

00:01:25

passed #331034
test-mutter

00:02:48