MONGOID-5844 Fix counting bug in HABTM associations #3924

Job	Run time
ruby-3.3 drv:current db:7.0 rails: fle: replica_set	13m 37s
ruby-3.2 drv:current db:6.0 rails: fle: replica_set	13m 49s
ruby-3.1 drv:current db:6.0 rails: fle: replica_set	13m 39s
ruby-3.0 drv:stable db:6.0 rails: fle: replica_set	13m 23s
ruby-3.3 drv:current db:7.0 rails:8.0 fle:helper server	12m 28s
ruby-3.2 drv:current db:7.0 rails:7.2 fle:helper server	12m 6s
ruby-3.2 drv:current db:7.0 rails:7.1 fle:helper server	12m 17s
ruby-3.1 drv:current db:7.0 rails:7.0 fle:helper server	12m 28s
ruby-3.1 drv:current db:6.0 rails:6.1 fle:helper server	12m 31s
ruby-3.0 drv:current db:6.0 rails:6.1 fle:helper server	12m 33s
ruby-3.0 drv:current db:6.0 rails:6.0 fle:helper server	12m 31s
jruby-9.4 drv:current db:6.0 rails:6.0 fle:helper server	22m 42s
ruby-3.1 drv:current db:5.0 rails: fle: replica_set	13m 56s
ruby-2.7 drv:current db:4.4 rails: fle: replica_set	13m 46s
	3h 11m 46s

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