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
5 jobs for !630 with wip/discard-page-flip-retries-on-hot-plug in 6 minutes and 55 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Review
passed #339047
check-commit-log

00:00:30

 
  Build
passed #339048
build-mutter

00:01:41

passed #339049
build-without-native-backend

00:03:46

 
  Test
passed #339051
can-build-gnome-shell

00:01:28

passed #339050
test-mutter

00:02:38