remove dependancy on hypercore tam symbols

Author: svenklemm

sql/updates/2.17.2--2.18.0.sql

@@ -155,10 +155,10 @@ CREATE PROCEDURE @[email protected]_chunks(
 ) LANGUAGE C AS '@MODULE_PATHNAME@', 'ts_update_placeholder';
 
 CREATE FUNCTION ts_hypercore_handler(internal) RETURNS table_am_handler
-AS '@MODULE_PATHNAME@', 'ts_hypercore_handler' LANGUAGE C;
+AS 'heap_tableam_handler' LANGUAGE internal;
 
 CREATE FUNCTION ts_hypercore_proxy_handler(internal) RETURNS index_am_handler
-AS '@MODULE_PATHNAME@', 'ts_hypercore_proxy_handler' LANGUAGE C;
+AS 'bthandler' LANGUAGE internal;
 
 CREATE ACCESS METHOD hypercore TYPE TABLE HANDLER ts_hypercore_handler;
 COMMENT ON ACCESS METHOD hypercore IS 'Storage engine using hybrid row/columnar compression';