fix(aci): rename DataConditionHandler type and filter_group

[ameliahsu]

Renaming type to group and filter_group to subgroup.

• type was a bit confusing because it can be confused with the data condition type (ex. age_comparison or first_seen_event) instead of the handler type (ex. workflow_trigger or action_filter)
• The name filter_group could have implied filtering conditions or data, rather than grouping in the UI. This attribute (now named subgroup) is used to create sub-categories (ex. "filter by frequency")

Note that these are just used for the UI so that we can filter/sort the registry.

[codecov]

Codecov Report

Attention: Patch coverage is 92.98246% with 4 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...try/workflow_engine/processors/delayed_workflow.py	60.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #87232       +/-   ##
===========================================
+ Coverage   33.18%   87.73%   +54.55%     
===========================================
  Files        8341     9864     +1523     
  Lines      464758   558746    +93988     
  Branches    22040    22040               
===========================================
+ Hits       154210   490201   +335991     
+ Misses     310117    68114   -242003     
  Partials      431      431               

[saponifi3d]

lgtm 🎉 thanks for the cleanup!