Use buffer-local value of 'comint-input-ring-size'

Use buffer-local value of 'comint-input-ring-size'

When 'comint-read-input-ring' was reading history to the ring,
the global value of 'comint-input-ring-size' was used regardless
of the local value, due to the use of a temporary buffer.
This change fixes the problem.
* lisp/comint.el (comint-read-input-ring): Use buffer-local
value of the ring size.  (Bug#72138)

(cherry picked from commit c1436ac64dc3b30af1ee3994ca346b9bb6984228)