Note potential performance implications

[kevbry]

It should be noted in documentation that using async operations in EF Core backed by sqlclient may result in very severe performance degradation over a synchronous option.

dotnet/efcore#22331

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Document Details

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• ID: 763dd10a-6619-d9b0-28fb-d9a0be0048b5
• Version Independent ID: 81b05619-22c4-cd7c-7d27-fcb08b888a77
• Content: Asynchronous Queries - EF Core
• Content Source: entity-framework/core/querying/async.md
• Product: entity-framework
• Technology: entity-framework-core
• GitHub Login: @smitpatel
• Microsoft Alias: avickers

[roji]

We don't usually note bugs and issues in external providers which are outside of our control - https://github.com/dotnet/sqlclient contains many other issues which may be blocking for other users etc.

But at this is quite severe, a limitations page under the SQL Server provider docs may be relevant, we'll discuss this in triage.