chg: dev: use only c23 or c11 noreturn specifiers
Use [[noreturn]] when compiling with C23 or greater.
The attribute macro name has been capitalized as NORETURN as defining it as noreturn breaks external headers.
#define noreturn __attribute__((noreturn)) wasn't used as C11's stdnoreturn.h/_Noreturn is required to build BIND9 in the first place.
Edited by Aydın Mercan