cleanup(pubsub): use client originated error in samples

[alevenberg]

This change is 

[codecov[bot]]

Codecov Report

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

Project coverage is 92.10%. Comparing base (7d7ff41) to head (3391456). Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14280      +/-   ##
==========================================
- Coverage   92.97%   92.10%   -0.88%     
==========================================
  Files        2045     1693     -352     
  Lines      175012   143951   -31061     
==========================================
- Hits       162726   132586   -30140     
+ Misses      12286    11365     -921     

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