Add partition_remove_hook logging and metrics #2136

Job	Run time
GEMs caching	48s
Brakeman	1m 2s
Check the consistency of the database constraints with the application validations	3m 13s
PqQ processors tests	1m 7s
Rubocop and bundle audit	1m 8s
Rspec tests (6, 0)	28m 58s
Rspec tests (6, 1)	10m 42s
Rspec tests (6, 2)	9m 39s
Rspec tests (6, 3)	24m 29s
Rspec tests (6, 4)	12m 32s
Rspec tests (6, 5)	14m 20s
Coverage	51s
	1h 48m 49s

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