Use calling assembly for determining build configuration (#598)

* Use calling assembly for determining build configuration

* Base configuration on projectMetadata type

* Remove unused using

Author: sschutten

src/CommunityToolkit.Aspire.Hosting.SqlDatabaseProjects/SqlProjectResource.cs

@@ -17,7 +17,7 @@ string IResourceWithDacpac.GetDacpacPath()
             var projectPath = projectMetadata.ProjectPath;
             using var projectCollection = new ProjectCollection();
 
-            var attr = Assembly.GetEntryAssembly()?.GetCustomAttribute<AssemblyConfigurationAttribute>();
+            var attr = projectMetadata.GetType().Assembly.GetCustomAttribute<AssemblyConfigurationAttribute>();
             if (attr is not null)
                 projectCollection.SetGlobalProperty("Configuration", attr.Configuration);