Rename thread pool protocol keys to snake case

[SimonCropp]

fixes #1471

[SimonCropp]

@bruno-garcia so should these be snake case as well?

    internal class MainSentryEventProcessor : ISentryEventProcessor
    {
        internal const string CultureInfoKey = "Current Culture";
        internal const string CurrentUiCultureKey = "Current UI Culture";
        internal const string MemoryInfoKey = "Memory Info";
        internal const string ThreadPoolInfoKey = "ThreadPool Info";
        internal const string IsDynamicCodeKey = "Dynamic Code";
        internal const string IsDynamicCodeCompiledKey = "Compiled";
        internal const string IsDynamicCodeSupportedKey = "Supported";

[bruno-garcia]

Either the way we want to show in the UI if not part of the protocol, or snake case and added to develop docs and changes in sentry UI to render nicely.

The "UI" culture is a known protocol I believe, just the key there is different because we add two instances.

[bruno-garcia]

Should we have some snapshot or other type of tests to validate this?

[codecov-commenter]

Codecov Report

Merging #1472 (988b513) into main (7fa7986) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1472      +/-   ##
==========================================
+ Coverage   84.25%   84.26%   +0.01%     
==========================================
  Files         219      219              
  Lines        7387     7387              
  Branches     1417     1417              
==========================================
+ Hits         6224     6225       +1     
  Misses        727      727              
+ Partials      436      435       -1     

Impacted Files	Coverage Δ
src/Sentry/Internal/MainSentryEventProcessor.cs	97.34% <100.00%> (ø)
src/Sentry/Internal/MemoryInfo.cs	100.00% <100.00%> (ø)
src/Sentry/Internal/ThreadPoolInfo.cs	100.00% <100.00%> (ø)
src/Sentry/Exceptions/SentryStackFrame.cs	81.70% <0.00%> (+1.21%)	⬆️

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