Add backport as arcade->sdk flow is blocked

Author: jkoritzinsky

src/SourceBuild/patches/runtime/0001-Make-default-artifact.patch

@@ -0,0 +1,60 @@
+From ca11f1fd4393a8c5feb606db786a84696972011f Mon Sep 17 00:00:00 2001
+From: Jeremy Koritzinsky <[email protected]>
+Date: Wed, 15 Jan 2025 16:04:05 -0800
+Subject: [PATCH] Make default artifact visibility customizable
+
+We can use this to filter PgoInstrument artifacts down primarily in the VMR orchestrator and only need to make changes in dotnet/sdk to still publish the `dotnet-sdk-pgo-*` archives.
+
+Backport: https://github.com/dotnet/arcade/pull/15419
+---
+ src/Microsoft.DotNet.Arcade.Sdk/tools/Publish.proj | 1 +
+ src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.proj    | 1 +
+ src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props   | 4 +++-
+ 3 files changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/src/Microsoft.DotNet.Arcade.Sdk/tools/Publish.proj b/src/Microsoft.DotNet.Arcade.Sdk/tools/Publish.proj
+index b3925190b7c..f698463a6b5 100644
+--- a/src/Microsoft.DotNet.Arcade.Sdk/tools/Publish.proj
++++ b/src/Microsoft.DotNet.Arcade.Sdk/tools/Publish.proj
+@@ -13,6 +13,7 @@
+       DotNetSymbolExpirationInDays      Symbol expiration time in days (defaults to 10 years).
+       SkipPackageChecks                 Skips package safety checks.
+       EnableDefaultArtifacts            Includes packages under "/artifacts/packages/**" for publishing. Defaults to true.
++      DefaultArtifactVisibility         The default visibility for Artifact items. Defaults to External.
+       DotNetBuildPass                   While building the repo as part of the entire .NET stack, this parameter specifies which build pass the current build is part of.
+                                           The build pass number gets added to the asset manifest file name to avoid collisions.
+ 
+diff --git a/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.proj b/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.proj
+index b4c7aab2df6..9d48f6d83bb 100644
+--- a/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.proj
++++ b/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.proj
+@@ -8,6 +8,7 @@
+     Optional variables:
+       EnableDefaultArtifacts            Includes *.nupkg, *.vsix and *.wixpack.zip under "/artifacts/packages/**" for sigining.
+                                         Defaults to true.
++      DefaultArtifactVisibility         The default visibility for Artifact items. Defaults to External.
+ 
+     Optional items:
+       Artifact (with Metadata)          Path to the artifact to publish. Declare the item in Signing.props to sign and publish the artifact.
+diff --git a/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props b/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props
+index 5889e5bacf8..13383c1bb19 100644
+--- a/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props
++++ b/src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props
+@@ -4,6 +4,8 @@
+   <PropertyGroup>
+     <!-- By default, search for sign aritfacts under the list of known directories. -->
+     <EnableDefaultArtifacts>true</EnableDefaultArtifacts>
++    <!-- By default, artifacts are externally visible -->
++    <DefaultArtifactVisibility>External</DefaultArtifactVisibility>
+   </PropertyGroup>
+ 
+   <!-- Repo extension point to sign and/or publish. Artifacts are shipping and blobs by default. -->
+@@ -11,7 +13,7 @@
+     <Artifact>
+       <PublishFlatContainer>true</PublishFlatContainer>
+       <IsShipping>true</IsShipping>
+-      <Visibility>External</Visibility>
++      <Visibility>$(DefaultArtifactVisibility)</Visibility>
+     </Artifact>
+   </ItemDefinitionGroup>
+