* Add check for valid symbol library link in annotation code to prevent
crash even if the symbol was not defined correctly. This will assert
in debug builds.
* Fix broken pin comparisons when library symbols have units with alternate
body style defined.
* Remove some macros from LIB_SYMBOL comparison function which made
debugging painful.
* Exit LIB_SYMBOL comparison function as soon as non-equivalent comparison
occurs.
* Fix broken library symbol comparison due to name differences when
checking for existing variants of the library symbol.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/14491