[z1874] Add new flag_extra NO_TALKTO_CREDIT

This flag is intended to make the process of removing the automatismn gossip.click -> quest-credit easier.
This flag will be removed when the converting is complete

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(based on commit a012051)

(cleaned version of 5d7c78f)

(based on commit [s1442] - f05ffce)