API Review Feedback

[martintmk]

Details on the issue fix or feature implementation

• Improved XML docs for arguments.
• Drop OnHedgingArguments.HasOutcome property
• Introduce FallbackActionArguments (instead of using FallbackPredicateArguments in FallbackAction delegate)
• Rename RetryDelayArguments to RetryDelayGeneratorArguments
• Rename HedgingDelayArguments to HedgingDelayGeneratorArguments
• Allow registering multiple listeners in TelemetryOptions

Contributes to #1507

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

Merging #1520 (d478352) into main (60288c8) will increase coverage by 0.01%.
Report is 5 commits behind head on main.
The diff coverage is 100.00%.

❗ Current head d478352 differs from pull request most recent head edbd646. Consider uploading reports for the commit edbd646 to get more accurate results

@@            Coverage Diff             @@
##             main    #1520      +/-   ##
==========================================
+ Coverage   84.10%   84.11%   +0.01%     
==========================================
  Files         277      278       +1     
  Lines        6581     6586       +5     
  Branches     1025     1026       +1     
==========================================
+ Hits         5535     5540       +5     
  Misses        837      837              
  Partials      209      209              

Flag	Coverage Δ
macos	84.11% <100.00%> (+0.01%)	⬆️
windows	84.11% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...CircuitBreaker/CircuitBreakerPredicateArguments.cs	100.00% <ø> (ø)
...ly.Core/CircuitBreaker/OnCircuitClosedArguments.cs	100.00% <ø> (ø)
...ly.Core/CircuitBreaker/OnCircuitOpenedArguments.cs	100.00% <ø> (ø)
.../Polly.Core/Fallback/FallbackPredicateArguments.cs	100.00% <ø> (ø)
src/Polly.Core/Fallback/OnFallbackArguments.cs	100.00% <ø> (ø)
...lly.Core/Hedging/HedgingDelayGeneratorArguments.cs	100.00% <ø> (ø)
...rc/Polly.Core/Hedging/HedgingPredicateArguments.cs	100.00% <ø> (ø)
src/Polly.Core/Retry/OnRetryArguments.cs	100.00% <ø> (ø)
...c/Polly.Core/Retry/RetryDelayGeneratorArguments.cs	100.00% <ø> (ø)
src/Polly.Core/Retry/RetryPredicateArguments.cs	100.00% <ø> (ø)
... and 12 more