qa/suites/upgrade/reef-x: ignore more POOL_FULL variants

qa/suites/upgrade/reef-x: ignore more POOL_FULL variants

Cover warnings like

  [WRN] POOL_FULL: 2 pool(s) full" in cluster log
  [WRN] pool 'test-librbd-smithi184-145008-24' is full (running out of quota)" in cluster log
  [WRN] Health detail: HEALTH_WARN 2 pool(s) full" in cluster log

POOL_FULL is already ignored, but only in a parenthesized form.  The
"... (XYZ)" vs "XYZ: ..." variety isn't specific to POOL_FULL, so get
rid of parenthesis throughout.  While at it, drop POOL_APP_NOT_ENABLED,
PG_AVAILABILITY and MON_DOWN which are duplicated in *-start.yaml.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>