feat(file source): make fingerprinter buffer internal (#23859)

* feat(file source): make fingerprinter buffer internal

* Fix clippy

* Fix more clippy

* Fix usage in kubernetes_logs

* Remove unsafe

* Remove unused from

* Rename fingerprinter functions

* Add missing panics to NoErrors

* Add resize_slice_mut

* Rename get_ functions

* Make internal buffer size an argument in ::new

* Move internal buffer size calculation

* Fix type