Update roslyn patch

Author: ViktorHofer

src/SourceBuild/patches/roslyn/0001-fix-compiler-errors-downgraded-sci.patch

@@ -0,0 +1,30 @@
+From 826604a1eef61831f205169d392b33983aa0340c Mon Sep 17 00:00:00 2001
+From: Viktor Hofer <viktor.hofer@microsoft.com>
+Date: Wed, 18 Dec 2024 14:38:02 +0100
+Subject: [PATCH] FIx build errors with newer toolset and dependencies
+
+Fixes the following two errors:
+- src/Features/Core/Portable/ExternalAccess/Watch/Api/WatchHotReloadService.cs(217,13): error CS1503: Argument 4: cannot convert from 'System.Collections.Immutable.ImmutableHashSet<Microsoft.CodeAnalysis.Project>' to 'System.Collections.Generic.IReadOnlySet<Microsoft.CodeAnalysis.Project>' [src/Features/Core/Portable/Microsoft.CodeAnalysis.Features.csproj::TargetFramework=net9.0]
+- src/roslyn/src/Features/Core/Portable/ExternalAccess/Watch/Api/WatchHotReloadService.cs(218,13): error CS1503: Argument 5: cannot convert from 'System.Collections.Immutable.ImmutableHashSet<Microsoft.CodeAnalysis.Project>' to 'System.Collections.Generic.IReadOnlySet<Microsoft.CodeAnalysis.Project>' [src/roslyn/src/Features/Core/Portable/Microsoft.CodeAnalysis.Features.csproj::TargetFramework=net9.0]
+
+The underlying SDK being used is "10.0.100-alpha.1.24555.54"
+
+Backport: https://github.com/dotnet/roslyn/pull/76486
+
+---
+ .../Core/Portable/Microsoft.CodeAnalysis.Features.csproj        | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/Features/Core/Portable/Microsoft.CodeAnalysis.Features.csproj b/src/Features/Core/Portable/Microsoft.CodeAnalysis.Features.csproj
+index c3729dd7244..48a5d9c53a7 100644
+--- a/src/Features/Core/Portable/Microsoft.CodeAnalysis.Features.csproj
++++ b/src/Features/Core/Portable/Microsoft.CodeAnalysis.Features.csproj
+@@ -139,7 +139,7 @@
+     <PackageReference Include="Microsoft.CodeAnalysis.AnalyzerUtilities" />
+     <PackageReference Include="Microsoft.CodeAnalysis.Elfie" Condition="'$(DotNetBuildSourceOnly)' != 'true'" />
+     <PackageReference Include="Microsoft.DiaSymReader" />
+-    <PackageReference Include="System.Text.Json" />
++    <PackageReference Include="System.Text.Json" Condition="'$(TargetFrameworkIdentifier)' != '.NETCoreApp'" />
+     <PackageReference Include="System.Threading.Tasks.Extensions" Condition="'$(TargetFrameworkIdentifier)' != '.NETCoreApp'" />
+   </ItemGroup>
+   <Import Project="..\..\..\Analyzers\Core\Analyzers\Analyzers.projitems" Label="Shared" />