recording only the top layer functions

[ChenyuLInx]

Description

When recorded functions are called (even indirectly) from another recorded function, we only want to record the call uppermost function in the call tree.

Checklist

• I have read the contributing guide and understand what's expected of me
• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue
• I have opened an issue to add/update docs, or docs changes are not required/relevant for this PR
• I have run changie new to create a changelog entry

[github-actions]

Thank you for your pull request! We could not find a changelog entry for this change. For details on how to document a change, see the contributing guide.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.94%. Comparing base (2253401) to head (4ac13fe).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #239      +/-   ##
==========================================
+ Coverage   68.89%   68.94%   +0.05%     
==========================================
  Files          52       52              
  Lines        3433     3439       +6     
==========================================
+ Hits         2365     2371       +6     
  Misses       1068     1068              

Flag	Coverage Δ
unit	68.94% <100.00%> (+0.05%)	⬆️

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[peterallenwebb]

Looks great!