chore: Remove or reduce sleep in e2e tests

[andrii-korotkov-verkada]

Closes #21009

Some sleeps may no longer be necessary or be too long. Try removing or reducing duration.

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Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

@@            Coverage Diff            @@
##             master   #21010   +/-   ##
=========================================
  Coverage          ?   55.07%           
=========================================
  Files             ?      324           
  Lines             ?    55466           
  Branches          ?        0           
=========================================
  Hits              ?    30549           
  Misses            ?    22310           
  Partials          ?     2607           

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[andrii-korotkov-verkada]

Seems to save about 1 minute. To be safe, may need to re-run tests after #21008 is merged.

Before:

After: