Dataset string memcap 3910/v3

[inashivb]

Link to redmine ticket: https://redmine.openinfosecfoundation.org/issues/3910

Previous PR: https://github.com/OISF/suricata/pull/11056

Changes since v2:

• get rid of all the unnecessary code, use getter logic within the THash API

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.63%. Comparing base (abb7424) to head (46d78b2). Report is 32 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #11058      +/-   ##
==========================================
+ Coverage   80.63%   83.63%   +3.00%     
==========================================
  Files         922      922              
  Lines      250137   250332     +195     
==========================================
+ Hits       201699   209374    +7675     
+ Misses      48438    40958    -7480     

Flag	Coverage Δ
fuzzcorpus	64.22% <100.00%> (-0.05%)	:arrow_down:
livemode	18.42% <33.33%> (-0.14%)	:arrow_down:
suricata-verify	62.76% <100.00%> (?)
unittests	62.26% <0.00%> (-0.01%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

[suricata-qa]

Information: QA ran without warnings.

Pipeline 20585