[TECH DEBT] Change gpg_decrypt_must_succeed to default to True

[Ch3LL]

442         else:                                                                                                                                                                                                   
443             salt.utils.versions.warn_until(                                                                                                                                                                     
444                 "Chlorine",                                                                                                                                                                                     
445                 "After the Chlorine release of Salt, gpg_decrypt_must_succeed will default to True.",                                                                                                           
446             ) 

The arg gpg_decrypt_must_succeed used in salt.renderers.gpg needs to default to true in salt/config/init.py in 3007.0