Make CC Mode and electric-pair-mode work together. This fixes bug #33794

Make CC Mode and electric-pair-mode work together.  This fixes bug #33794

* lisp/progmodes/cc-cmds.el (c-electric-pound, c-electric-slash)
(c-electric-star, c-electric-semi&comma, c-electric-colon, c-electric-lt-gt):
Bind post-self-insert-hook to nil around calls to self-insert-command to
protect against arbitrary functionality confusing CC Mode.
(c-do-brace-electrics): New function, extracted from c-electric-brace and
enhanced.
(c-electric-brace): Bind post-self-insert-hook to nil around the call to
self-insert-command.  When electric-pair-mode is configured, call
electric-pair-post-self-insert-function.  Handle any deletion done by this
function.  Call c-do-brace-electrics for the inserted brace, and perhaps for a
brace inserted by electric-pair-self-insert-function.
(c-electric-paren): Bind post-self-insert-hook to nil around the call to
self-insert-command.  When electric-pair-mode is configured, call
electric-pair-post-self-insert-function.