add purge options

[famarting]

Description

blocked by microsoft/durabletask-go#82

closes #497

Issue reference

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 61.54%. Comparing base (27248ba) to head (525ff6a).
Report is 25 commits behind head on main.

Files with missing lines	Patch %	Lines
workflow/client.go	16.66%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #638      +/-   ##
==========================================
+ Coverage   58.04%   61.54%   +3.49%     
==========================================
  Files          55       56       +1     
  Lines        3568     3440     -128     
==========================================
+ Hits         2071     2117      +46     
+ Misses       1375     1197     -178     
- Partials      122      126       +4     

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