Fix S4225 warnings of extension methods for object class

[sukreshmanda]

Pull Request

This includes warning suppression for IDE0022 as it is blocking the build

The issue or feature being addressed

#1290

Details on the issue fix or feature implementation

• Adding extension methods on object type is not recommended .
• Using Dictionary<string, object> will solve the issue. So no need for test/Polly.Specs/Helpers/ObjectExtensions.cs

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 85.35%. Comparing base (411cfdc) to head (030c162).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2253      +/-   ##
==========================================
+ Coverage   85.33%   85.35%   +0.02%     
==========================================
  Files         313      313              
  Lines        7444     7444              
  Branches     1122     1122              
==========================================
+ Hits         6352     6354       +2     
+ Misses        746      745       -1     
+ Partials      346      345       -1     

Flag	Coverage Δ
linux	85.35% <ø> (+0.02%)	⬆️
macos	85.33% <ø> (ø)
windows	85.33% <ø> (ø)

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[martincostello]

Thanks!