MONGOID-5836 Don't repeat callbacks for embedded grandchildren. #3877

Job	Run time
ruby-3.3 drv:current db:7.0 rails: fle: replica_set	14m 16s
ruby-3.2 drv:current db:6.0 rails: fle: replica_set	14m 0s
ruby-3.1 drv:current db:6.0 rails: fle: replica_set	14m 10s
ruby-3.0 drv:stable db:6.0 rails: fle: replica_set	14m 5s
ruby-3.3 drv:current db:7.0 rails:8.0 fle:helper server	12m 55s
ruby-3.2 drv:current db:7.0 rails:7.2 fle:helper server	12m 27s
ruby-3.2 drv:current db:7.0 rails:7.1 fle:helper server	12m 53s
ruby-3.1 drv:current db:7.0 rails:7.0 fle:helper server	13m 3s
ruby-3.1 drv:current db:6.0 rails:6.1 fle:helper server	12m 55s
ruby-3.0 drv:current db:6.0 rails:6.1 fle:helper server	12m 41s
ruby-3.0 drv:current db:6.0 rails:6.0 fle:helper server	13m 23s
jruby-9.4 drv:current db:6.0 rails:6.0 fle:helper server	21m 40s
ruby-3.1 drv:current db:5.0 rails: fle: replica_set	14m 15s
ruby-2.7 drv:current db:4.4 rails: fle: replica_set	13m 46s
	3h 16m 29s

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