Follow-up of #1502: Replace temp dicts with hashtable

[zuiderkwast]

Let's replace these temporary dicts with a hashtables:

• sdsReplyDictType
  • (Originally posted by @zuiderkwast in Replace dict with new hashtable: hash datatype #1502 (comment))
• hashDictType
  • (Originally posted by @zuiderkwast in Replace dict with new hashtable: hash datatype #1502 (comment))

[ranshid]

this will be pickedup by @zarkash-aws (cassigned to myself as I cannot assign issues to her)

[zuiderkwast]

Great. It can be done incrementally in two steps: one for each of the dict types.