Creates a default CacheKeyPrefix scheme that prefixes cache keys with the name
of the cache followed by double colons.
For example, a cache named myCache will prefix all cache keys with myCache::.
Creates a CacheKeyPrefix scheme that prefixes cache keys with the given prefix.
The prefix is prepended to the cacheName followed by double colons.
For example, a prefix redis- with a cache named myCache
results in redis-myCache::.