chore: Setup logging only once

[bitsandfoxes]

Resolves getsentry/sentry-unity#2248

Super minor but I had an issue open on the Unity SDK about it: We don't need to warn about setting up debug logging in production twice, right? Only once when actually setting the logger should suffice?

Sentry: (Warning) Sentry option 'Debug' is set to true while Environment is production. Be aware this can cause performance degradation and is not advised. See https://docs.sentry.io/platforms/dotnet/configuration/diagnostic-logger for more information 
UnityEngine.DebugLogHandler:Internal_Log(LogType, LogOption, String, Object)
Sentry.Unity.UnityLogger:Log(SentryLevel, String, Exception, Object[])
Sentry.SentrySdk:InitHub(SentryOptions)
Sentry.SentrySdk:Init(SentryOptions)
Sentry.Unity.SentryUnitySdk:Init(SentryUnityOptions)
Sentry.Unity.SentrySdk:Init(SentryUnityOptions)

Sentry: (Debug) DSN read from options: https://huehue@hue.ingest.us.sentry.io/huehuehue 
UnityEngine.DebugLogHandler:Internal_Log(LogType, LogOption, String, Object)
Sentry.Unity.UnityLogger:Log(SentryLevel, String, Exception, Object[])
Sentry.Internal.SettingLocator:GetDsn()
Sentry.SentrySdk:InitHub(SentryOptions)
Sentry.SentrySdk:Init(SentryOptions)
Sentry.Unity.SentryUnitySdk:Init(SentryUnityOptions)
Sentry.Unity.SentrySdk:Init(SentryUnityOptions)

Sentry: (Debug) Initializing Hub for Dsn: 'https://huehue@hue.ingest.us.sentry.io/huehuehue'. 
UnityEngine.DebugLogHandler:Internal_Log(LogType, LogOption, String, Object)
Sentry.Unity.UnityLogger:Log(SentryLevel, String, Exception, Object[])
Sentry.Internal.Hub:.ctor(SentryOptions, ISentryClient, ISessionManager, ISystemClock, IInternalScopeManager, RandomValuesFactory, IReplaySession, ISampleRandHelper, BackpressureMonitor)
Sentry.SentrySdk:InitHub(SentryOptions)
Sentry.SentrySdk:Init(SentryOptions)
Sentry.Unity.SentryUnitySdk:Init(SentryUnityOptions)
Sentry.Unity.SentrySdk:Init(SentryUnityOptions)

Sentry: (Warning) Sentry option 'Debug' is set to true while Environment is production. Be aware this can cause performance degradation and is not advised. See https://docs.sentry.io/platforms/dotnet/configuration/diagnostic-logger for more information 
UnityEngine.DebugLogHandler:Internal_Log(LogType, LogOption, String, Object)
Sentry.Unity.UnityLogger:Log(SentryLevel, String, Exception, Object[])
Sentry.SentryClient:.ctor(SentryOptions, IBackgroundWorker, RandomValuesFactory, ISessionManager, BackpressureMonitor)
Sentry.Internal.Hub:.ctor(SentryOptions, ISentryClient, ISessionManager, ISystemClock, IInternalScopeManager, RandomValuesFactory, IReplaySession, ISampleRandHelper, BackpressureMonitor)
Sentry.SentrySdk:InitHub(SentryOptions)
Sentry.SentrySdk:Init(SentryOptions)
Sentry.Unity.SentryUnitySdk:Init(SentryUnityOptions)
Sentry.Unity.SentrySdk:Init(SentryUnityOptions)

#skip-changelog

[codecov]

Codecov Report

❌ Patch coverage is 57.14286% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.36%. Comparing base (9895de7) to head (17ceb74).
⚠️ Report is 64 commits behind head on main.

Files with missing lines	Patch %	Lines
src/Sentry/SentryOptions.cs	53.84%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4706      +/-   ##
==========================================
- Coverage   73.50%   73.36%   -0.14%     
==========================================
  Files         483      482       -1     
  Lines       17692    17574     -118     
  Branches     3492     3475      -17     
==========================================
- Hits        13005    12894     -111     
- Misses       3796     3827      +31     
+ Partials      891      853      -38     

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[jamescrosswell]

Thanks @bitsandfoxes