Update dependencies and remove unused EF Core

Removed the Microsoft.EntityFrameworkCore namespace from Program.cs.
In SqlDatabaseVectorSearch.csproj:
- Removed EntityFrameworkCore.Exceptions.SqlServer package.
- Updated Microsoft.AspNetCore.OpenApi from 8.0.8 to 8.0.10.
- Updated Microsoft.SemanticKernel from 1.21.1 to 1.22.0.
- Updated TinyHelpers from 3.1.16 to 3.1.18.

SqlDatabaseVectorSearch/Program.cs

@@ -1,6 +1,5 @@
 using Microsoft.AspNetCore.Http.HttpResults;
 using Microsoft.Data.SqlClient;
-using Microsoft.EntityFrameworkCore;
 using Microsoft.OpenApi.Models;
 using Microsoft.SemanticKernel;
 using MinimalHelpers.OpenApi;