Rename GistTranslateStratnum() to GistTranslateCompareType()
Follow up to commit
630f9a43cec. The previous name had become
confusing, because it doesn't actually translate a strategy number but
a CompareType into a strategy number. We might add the inverse at
some point, which would then probably be called something like
GistTranslateStratnum.
Reviewed-by: Mark Dilger <mark.dilger@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/
E72EAA49-354D-4C2E-8EB9-
255197F55330@enterprisedb.com