Fix: braces from tag keys on DefaultSentryScopeStateProcessor.

[lucas-zimerman]

This PR removes any brackets from keys applied on DefaultSentryScopeStateProcessor if state is IEnumerable<KeyValuePair<string, object>>

Close #1177.

[codecov-commenter]

Codecov Report

Merging #1183 (250152f) into main (b55b55c) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1183      +/-   ##
==========================================
+ Coverage   80.47%   80.48%   +0.01%     
==========================================
  Files         212      212              
  Lines        6887     6888       +1     
  Branches     1571     1571              
==========================================
+ Hits         5542     5544       +2     
+ Misses        826      823       -3     
- Partials      519      521       +2     

Impacted Files	Coverage Δ
src/Sentry/DefaultSentryScopeStateProcessor.cs	66.66% <100.00%> (+1.96%)	⬆️
src/Sentry/Internal/BackgroundWorker.cs	83.33% <0.00%> (-0.73%)	⬇️
src/Sentry/Internal/Hub.cs	65.67% <0.00%> (+0.99%)	⬆️

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