Fix S3800/CA1821/S2955

[baranyaimate]

The issue or feature being addressed

Contributes to #1290

Details on the issue fix or feature implementation

Fix S3800, CA1821 and S2955.

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

Attention: Patch coverage is 50.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 83.67%. Comparing base (197cc16) to head (9403059).

Files	Patch %	Lines
src/Polly/Policy.HandleSyntax.cs	50.00%	0 Missing and 1 partial ⚠️
src/Polly/PolicyBuilder.OrSyntax.cs	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2020      +/-   ##
==========================================
+ Coverage   83.64%   83.67%   +0.02%     
==========================================
  Files         312      312              
  Lines        7105     7105              
  Branches     1054     1054              
==========================================
+ Hits         5943     5945       +2     
  Misses        789      789              
+ Partials      373      371       -2     

Flag	Coverage Δ
linux	83.67% <50.00%> (+0.02%)	⬆️
macos	?
windows	83.67% <50.00%> (+0.02%)	⬆️

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