Build Warnings: Suppress ASPDEPR003 warnings in DevelopmentMode.Backoffice (#21259)

Silences deprecation warning in dev mode

Silences deprecated runtime-compile warning in dev mode
Keeps development-time runtime compilation enabled for in-memory dev setup
Relates to ASPDEPR003

Author: readingdancer

src/Umbraco.Cms.DevelopmentMode.Backoffice/InMemoryAuto/UmbracoRazorReferenceManager.cs

@@ -7,6 +7,8 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.Extensions.Options;
 
+#pragma warning disable ASPDEPR003 // MvcRazorRuntimeCompilationOptions is obsolete - intentional use for development-mode runtime compilation
+
 namespace Umbraco.Cms.DevelopmentMode.Backoffice.InMemoryAuto;
 
 

src/Umbraco.Cms.DevelopmentMode.Backoffice/InMemoryAuto/UmbracoViewCompilerProvider.cs

@@ -7,6 +7,8 @@
 using Microsoft.Extensions.Options;
 using Umbraco.Cms.Core.Exceptions;
 
+#pragma warning disable ASPDEPR003 // MvcRazorRuntimeCompilationOptions is obsolete - intentional use for development-mode runtime compilation
+
 namespace Umbraco.Cms.DevelopmentMode.Backoffice.InMemoryAuto;
 
 internal sealed class UmbracoViewCompilerProvider : IViewCompilerProvider