Make Cosmos tests faster by not re-initializing the database between each NonShared test (#35841)

Author: AndriySvyryd

Diff for: .github/workflows/TestCosmos.yaml

@@ -17,7 +17,7 @@ jobs:
       - name: Start Cosmos Emulator
         run: |
           Import-Module "$env:ProgramFiles\Azure Cosmos DB Emulator\PSModules\Microsoft.Azure.CosmosDB.Emulator"
-          Start-CosmosDbEmulator -Timeout 360
+          Start-CosmosDbEmulator -Timeout 540 -NoUI -NoTelemetry -NoFirewall -EnablePreview
 
       - name: Checkout
         uses: actions/checkout@v4

Diff for: src/EFCore.Cosmos/Storage/Internal/CosmosClientWrapper.cs

@@ -8,7 +8,6 @@
 using System.Text;
 using Microsoft.EntityFrameworkCore.Cosmos.Diagnostics.Internal;
 using Microsoft.EntityFrameworkCore.Cosmos.Infrastructure.Internal;
-using Microsoft.EntityFrameworkCore.Cosmos.Internal;
 using Microsoft.EntityFrameworkCore.Cosmos.Metadata.Internal;
 using Microsoft.EntityFrameworkCore.Internal;
 using Newtonsoft.Json;