Commit Briefs
tmp commit (ligurio/gh-4842-qsync-testing, origin/ligurio/gh-4842-qsync-testing)
[FIXUP] review fixes
Blocked by bugs: - qsync_sync_mode.test.lua: #5603 - qsync_random_leader.test.lua: #5601 #5515 #5604 and [1] 1. https://github.com/tarantool/small/issues/28
qsync: add test with change space sync mode in a loop
Closes #5055 Part of #5144
qsync: add test with random leaders promotion and demotion
Part of #5055 Part of #5144
qsync: test clear_synchro_queue() function
Part of #5055 Part of #4849