zap-to-char: case sensitive for upper-case characters

zap-to-char: case sensitive for upper-case characters

In interactive calls, behave case-sensitively if the given char
is an upper-case character.  Same for zap-up-to-char (Bug#54804).

This is analog to what the user-level incremental search feature does.

* lisp/misc.el (zap-up-to-char): Add an optional arg INTERACTIVE.
Perform a case-sensitive search when INTERACTIVE is non-nil and
CHAR is an upper-case character.
* lisp/simple.el (zap-to-char): Same.

* etc/NEWS (Editing Changes in Emacs 29.1): Announce this change.
* test/lisp/misc-tests.el (misc-test-zap-up-to-char): Add test cases.
* test/lisp/simple-tests.el (with-zap-to-char-test): Add helper macro.
(simple-tests-zap-to-char): Add a test.