Modules: dictionary API work in progress #5: rename API for consistency.
Modules: dictionary API work in progress #5: rename API for consistency.

By using the "C" suffix for functions getting pointer/len, we can do the
same in the future for other modules APIs that need a variant with
pointer/len and that are now accepting a RedisModuleString.

JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis