Revert "Bump Microsoft.Data.SqlClient from 5.1.5 to 5.2.2 (#2992)"

This reverts commit 96230a9.

Author: binon

DigitalLearningSolutions.Data.Migrations/DigitalLearningSolutions.Data.Migrations.csproj

@@ -19,7 +19,7 @@
     <PackageReference Include="Dapper" Version="2.1.35" />
     <PackageReference Include="FluentMigrator" Version="3.3.2" />
     <PackageReference Include="FluentMigrator.Extensions.SqlServer" Version="3.3.2" />
-    <PackageReference Include="Microsoft.Data.SqlClient" Version="5.2.2" />
+    <PackageReference Include="Microsoft.Data.SqlClient" Version="5.1.5" />
   </ItemGroup>
 
   <ItemGroup>