Add AttemptNumber to HedgingPredicateArguments

[peter-csala]

Pull Request

The issue or feature being addressed

#2602

Details on the issue fix or feature implementation

The API is not the most convenient, but backward compatible.

Confirm the following

• I started this PR by branching from the head of the default branch
• I have targeted the PR to merge into the default branch
• I have included unit tests for the issue/feature
• I have successfully run a local build

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.23%. Comparing base (9602a0e) to head (9c45623).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2603   +/-   ##
=======================================
  Coverage   96.23%   96.23%           
=======================================
  Files         311      311           
  Lines        7327     7329    +2     
  Branches     1013     1013           
=======================================
+ Hits         7051     7053    +2     
  Misses        222      222           
  Partials       54       54           

Flag	Coverage Δ
linux	96.23% <100.00%> (+<0.01%)	⬆️
macos	96.23% <100.00%> (+<0.01%)	⬆️
windows	96.22% <100.00%> (+<0.01%)	⬆️

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[martincostello]

Looks like we don't have an "end-to-end" test change anywhere that asserts that the attempt number correctly increments.

[github-actions]

Thanks for your contribution @peter-csala - the changes from this pull request have been published as part of version 8.6.0 📦, which is now available from NuGet.org 🚀