feat(ngPluralize): add support for bind-once in `count`

The 1st commit contains the change and test for adding support for `bindOnce` in `count`.
The 2nd commit contains some nimor refactoring (mainly to avoid repetitive actions).

Closes #10004
(Makes #5452 obsolete)
they add an extra hook in an aleady multi-hook process which complicates things and causes headaches which are very hard to debug, I want them gone .v.