Add 4 new feature switches that are not going to be publicly documented (#105496)

Author: LakshanF

docs/workflow/trimming/feature-switches.md

@@ -8,6 +8,10 @@ configurations but their defaults might vary as any SDK can set the defaults dif
 
 | MSBuild Property Name | AppContext Setting | Description |
 |-|-|-|
+| DisableDependencyInjectionDynamicEngine | Microsoft.Extensions.DependencyInjection.DisableDynamicEngine | When set to true, DependencyInjection will avoid using System.Reflection.Emit when realizing services. |
+| DynamicCodeSupport | System.Runtime.CompilerServices.RuntimeFeature.IsDynamicCodeSupported | Changes RuntimeFeature.IsDynamicCodeSupported to false to allow testing AOT-safe fallback code without publishing for Native AOT. |
+| EnableGeneratedComInterfaceComImportInterop | System.Runtime.InteropServices.Marshalling.EnableGeneratedComInterfaceComImportInterop | When set to true, enables casting source-generated COM object wrappers to built-in COM-based COM interfaces. |
+| VerifyDependencyInjectionOpenGenericServiceTrimmability | Microsoft.Extensions.DependencyInjection.VerifyOpenGenericServiceTrimmability | When set to true, DependencyInjection will verify trimming annotations applied to open generic services are correct. |
 | _AggressiveAttributeTrimming | System.AggressiveAttributeTrimming | When set to true, aggressively trims attributes to allow for the most size savings possible, even if it could result in runtime behavior changes |
 | _ComObjectDescriptorSupport | System.ComponentModel.TypeDescriptor.IsComObjectDescriptorSupported | When set to true, supports creating a TypeDescriptor based view of COM objects. |
 | _DefaultValueAttributeSupport | System.ComponentModel.DefaultValueAttribute.IsSupported | When set to true, supports creating a DefaultValueAttribute at runtime. |