Add optional delay parameter to no-op step

[dbwiddis]

Description

Adds an optional delay to the no-op workflow step

Issues Resolved

Fixes #649

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[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 72.35%. Comparing base (b8e4ed0) to head (6b81dbc).

❗ Current head 6b81dbc differs from pull request most recent head 05787ec. Consider uploading reports for the commit 05787ec to get more accurate results

Files	Patch %	Lines
...rg/opensearch/flowframework/workflow/NoOpStep.java	81.81%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #674      +/-   ##
============================================
+ Coverage     72.32%   72.35%   +0.02%     
- Complexity      686      687       +1     
============================================
  Files            82       82              
  Lines          3574     3585      +11     
  Branches        294      295       +1     
============================================
+ Hits           2585     2594       +9     
- Misses          857      859       +2     
  Partials        132      132              

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