feat(testing): add reconfiguration completion detection mechanism #28805

Job	Run time
build / Build dependencies	10s
Lint, Doc and Unit tests	5m 48s
Postgres integration - first (01-04) tests	25m 23s
DB-less integration tests	22m 36s
Postgres integration - second (>= 05) tests	27m 55s
PDK tests	3m 54s
Postgres plugins - first (01-04) tests	10m 55s
Postgres plugins - second (>= 05) tests	12m 5s
Luacov stats aggregator	0s
	1h 48m 46s

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