Made use of AsyncNonKeyedLocker; bumped AsyncKeyedLock library.

[MarkCiliaVincenti]

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[what-the-diff]

PR Summary

• Updated Locking Package Version
  The software package that helps manage access to resources, known as 'AsyncKeyedLock', has been updated to the latest version. This is done in the EFCoreSecondLevelCacheInterceptor.csproj file.

• Integrated AsyncKeyedLock in EFServiceProvider
  The 'AsyncKeyedLock' package is now fully integrated into the EFServiceProvider.cs file. This ensures we can use the functions provided by this package in managing resources efficiently.

• Revised Thread Synchronization Approach
  Previously, we used a method called SemaphoreSlim for controlling access to resources across different threads in our system. In the EFServiceProvider.cs file, including its methods GetConnectionString and RunInContextAsync, we have switched to using an improved method known as 'AsyncNonKeyedLocker', provided by our updated 'AsyncKeyedLock' package. This new method should provide better efficiency and performance in our system's operations.