Use SearchSysCacheCopy1 macro instead of SearchSysCacheCopy direct call as more future-proof
Use SearchSysCacheCopy1 macro instead of SearchSysCacheCopy direct call as more future-proof

Per syscache.h:
> The use of the macros below rather than direct calls to the corresponding
> functions is encouraged, as it insulates the caller from changes in the
> maximum number of keys.

Also this fixes segfault on pg14, but still not sure why exactly.

reorg/pg_repack,reorg/pg_repack