Add Arcade patch to copy symbol files with hardlinks in the VMR (dotn…

…et#46178)

src/SourceBuild/patches/arcade/0002-copy-symbols-files-with-hard.patch

@@ -0,0 +1,24 @@
+From 7bee88fbf4f53b43469e91117233274a6b4c4734 Mon Sep 17 00:00:00 2001
+From: Jeremy Koritzinsky <[email protected]>
+Date: Tue, 21 Jan 2025 11:55:11 -0800
+Subject: [PATCH] Copy symbol files with hardlinks when possible
+
+Backport: https://github.com/dotnet/arcade/pull/15436
+---
+ .../tools/SourceBuild/SourceBuildArcade.targets                | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/Microsoft.DotNet.Arcade.Sdk/tools/SourceBuild/SourceBuildArcade.targets b/src/Microsoft.DotNet.Arcade.Sdk/tools/SourceBuild/SourceBuildArcade.targets
+index 867ecf758a6..f314450b9f7 100644
+--- a/src/Microsoft.DotNet.Arcade.Sdk/tools/SourceBuild/SourceBuildArcade.targets
++++ b/src/Microsoft.DotNet.Arcade.Sdk/tools/SourceBuild/SourceBuildArcade.targets
+@@ -216,7 +216,8 @@
+     <MakeDir Directories="$(SourceBuiltSymbolsDir)" />
+     <Copy
+       SourceFiles="@(AbsoluteSymbolPath)"
+-      DestinationFolder="$(SourceBuiltSymbolsDir)%(RecursiveDir)" />
++      DestinationFolder="$(SourceBuiltSymbolsDir)%(RecursiveDir)"
++      UseHardlinksIfPossible="true" />
+   </Target>
+   <!--
+     This target can be removed once we enable standard repo assets manifests and SB orchestrator