HH-45000 remove @dispatcher
HH-45000 initialize logger as soon as possible
HH-45000 make logging more consistent
HH-45000 update debug page and add debug page tests
HH-45000 fix debug page styles
Merge remote-tracking branch 'origin/HH-45000' into EXP-12285
release 2.21.0 [an.sumin@hh.ru]