test(e2e): add doc for ZOT test data

[qweeah]

Resolves #1071

[codecov-commenter]

Codecov Report

Merging #1100 (4e2a8e0) into main (d69c778) will increase coverage by 0.27%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

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@@            Coverage Diff             @@
##             main    #1100      +/-   ##
==========================================
+ Coverage   80.01%   80.28%   +0.27%     
==========================================
  Files          57       57              
  Lines        2927     2927              
==========================================
+ Hits         2342     2350       +8     
+ Misses        406      398       -8     
  Partials      179      179              

see 3 files with indirect coverage changes

[shizhMSFT]

LGTM