fix(dbless) flip both kong.cache and kong.core_cache (#5980)
fix(dbless) flip both kong.cache and kong.core_cache (#5980)

I noticed this when looking at the logs and spotting that
when `kong.db.declarative.init` purges the shadow page,
of both `kong.cache` and `kong.core_cache`, the page numbers
for each were not in sync.
Kong/kong,Kong/kong,Kong/kong