Fix EF Core garbage collected messages and ordering.

[lucas-zimerman]

• Don't show the message the span was garbage collected when it wasn't.
• Fix spans grouping (connection/query compiler spans being created on the main transaction and execution spans being created to parent span)

[codecov-commenter]

Codecov Report

Merging #1368 (7986548) into main (1605e97) will increase coverage by 1.39%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##             main    #1368      +/-   ##
==========================================
+ Coverage   81.26%   82.66%   +1.39%     
==========================================
  Files         215      215              
  Lines        7142     7146       +4     
  Branches     1407     1408       +1     
==========================================
+ Hits         5804     5907     +103     
+ Misses        913      805     -108     
- Partials      425      434       +9     

Impacted Files	Coverage Δ
...Internals/DiagnosticSource/SentryEFCoreListener.cs	89.28% <83.33%> (+0.53%)	⬆️
src/Sentry/Internal/AppDomainAdapter.cs	66.66% <0.00%> (ø)
src/Sentry/PlatformAbstractions/RuntimeInfo.cs	58.62% <0.00%> (+5.17%)	⬆️
...ntry/Integrations/NetFxInstallationsIntegration.cs	57.14% <0.00%> (+28.57%)	⬆️
...ntry/PlatformAbstractions/FrameworkInstallation.cs	62.50% <0.00%> (+37.50%)	⬆️
...rmAbstractions/NetFxInstallationsEventProcessor.cs	72.72% <0.00%> (+68.18%)	⬆️
...Sentry/PlatformAbstractions/FrameworkInfo.NetFx.cs	70.42% <0.00%> (+70.42%)	⬆️
src/Sentry/PlatformAbstractions/FrameworkInfo.cs	100.00% <0.00%> (+100.00%)	⬆️
...ntry/PlatformAbstractions/RegistryKeyExtensions.cs	100.00% <0.00%> (+100.00%)	⬆️

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