MONGOID-5391 - Add #pluck_each, extract out PluckEnumerator #3523

Job	Run time
ruby-3.2 drv:current db:6.0 rails: fle: replica_set	12m 47s
ruby-3.1 drv:current db:6.0 rails: fle: replica_set	12m 36s
ruby-3.0 drv:current db:6.0 rails: fle: replica_set	13m 15s
ruby-3.0 drv:stable db:6.0 rails: fle: replica_set	13m 7s
ruby-3.1 drv:current db:6.0 rails:7.0 fle:helper server	12m 7s
ruby-3.1 drv:current db:6.0 rails:6.1 fle:helper server	11m 22s
ruby-3.0 drv:current db:6.0 rails:7.0 fle:helper server	11m 21s
ruby-3.0 drv:current db:6.0 rails:6.1 fle:helper server	11m 30s
ruby-3.0 drv:current db:6.0 rails:6.0 fle:helper server	11m 27s
jruby-9.4 drv:current db:6.0 rails:6.0 fle:helper server	20m 4s
ruby-3.1 drv:current db:5.0 rails: fle: replica_set	12m 41s
ruby-2.7 drv:current db:4.4 rails: fle: replica_set	12m 20s
ruby-2.7 drv:current db:4.0 rails: fle: replica_set	12m 6s
ruby-2.7 drv:current db:3.6 rails: fle: replica_set	11m 35s
	2h 58m 18s

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