Replaced temp dicts with hashtable in hrandfieldWithCountCommand.

[zarkash-aws]

This PR resolves #1550 by replacing the use of temporary dict structures with hashtable in hrandfieldWithCountCommand.

Notes:
CASE 3: Replaced sdsReplyDictType with hashHashtableType to efficiently store field-value pairs using hashTypeEntry.
CASE 4: Replaced hashDictType with setHashtableType, as only the field needs to be stored.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.05%. Comparing base (d56a1f7) to head (4c2d2f0).

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #1793      +/-   ##
============================================
- Coverage     71.06%   71.05%   -0.02%     
============================================
  Files           123      123              
  Lines         65671    65665       -6     
============================================
- Hits          46669    46655      -14     
- Misses        19002    19010       +8     

Files with missing lines	Coverage Δ
src/t_hash.c	96.34% <100.00%> (+0.10%)	⬆️

... and 9 files with indirect coverage changes

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[zarkash-aws]

update -
In CASE 3: Changed hashtable type from hashHashtableType to sdsReplyHashtableType. Updated hashtable to store a pointer to the hashtype entries instead of storing entries directly. This simplifies handling of the 'withvalue' case, as it no longer requires explicitly providing a value to create an entry.

[xbasel]

why not
ret = hashtableAdd(ht, hi.entry);
?

This code can be reduce to:

        while (hashTypeNext(&hi) != C_ERR) {
            serverAssert(hashtableAdd(ht, hi.next));
        }

[xbasel]

Consider removing addWritePreparedReplyBulkSds and use addReplyBulkCBuffer instead, no sdsdup is needed