databases/rubygem-pg_query: fix build with lld 17

Building databases/rubygem-pg_query with lld 17 results in the following
link error:

ld: error: version script assignment of 'global' to symbol '_Init_pg_query' failed: symbol not defined

The mentioned symbol has been removed from pg_query.so, so remove it
from the linker version script.

PR: 273753
MFH: 2023Q4