Improve debugging experience for ResilienceProperties

[martintmk]

Details on the issue fix or feature implementation

Noticed while playing with the API. These changes make it more friendly to debug and view what's inside ResilienceProperties.

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 #1524 (9db08b1) into main (dd511b2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1524   +/-   ##
=======================================
  Coverage   84.00%   84.00%           
=======================================
  Files         278      278           
  Lines        6540     6540           
  Branches     1023     1023           
=======================================
  Hits         5494     5494           
  Misses        837      837           
  Partials      209      209           

Flag	Coverage Δ
macos	84.00% <ø> (?)
windows	84.00% <ø> (ø)

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Files Changed	Coverage Δ
src/Polly.Core/ResilienceProperties.cs	100.00% <ø> (ø)