Add detached signature CertificatesSignInfo (#16248)

Author: MichaelSimons

src/Microsoft.DotNet.Arcade.Sdk/tools/Sign.props

@@ -30,6 +30,8 @@
     <CertificatesSignInfo Include="MacDeveloperWithNotarization" MacCertificate="MacDeveloper" MacNotarizationAppName="dotnet" />
     <CertificatesSignInfo Include="MacDeveloperVNextWithNotarization" MacCertificate="MacDeveloperVNext" MacNotarizationAppName="dotnet" />
     <CertificatesSignInfo Include="MacDeveloperVNextHardenWithNotarization" MacCertificate="MacDeveloperVNextHarden" MacNotarizationAppName="dotnet" />
+    <!-- Certificates Which support detached signatures -->
+    <CertificatesSignInfo Include="LinuxSignTar" SupportsDetachedSignature="true" />
   </ItemGroup>
 
   <!-- Only publish packages that contain this build's Target RID in the name.

src/Microsoft.DotNet.SignTool.Tests/SignToolTests.cs

@@ -2773,7 +2773,7 @@ public void ValidateSignToolTaskParsing()
                 }),
                 new TaskItem("DetachedArchiveCert", new Dictionary<string, string>
                 {
-                    { "DetachedSignature", "true" }
+                    { "SupportsDetachedSignature", "true" }
                 }),
             };
 

src/Microsoft.DotNet.SignTool/src/SignToolTask.cs

@@ -367,7 +367,7 @@ private Dictionary<string, List<AdditionalCertificateInformation>> ParseAddition
                     var macSigningOperation = certificateSignInfo.GetMetadata("MacCertificate");
                     var macNotarizationAppName = certificateSignInfo.GetMetadata("MacNotarizationAppName");
                     var collisionPriorityId = certificateSignInfo.GetMetadata(SignToolConstants.CollisionPriorityId);
-                    var detachedSignatureCertificate = certificateSignInfo.GetMetadata("DetachedSignature");
+                    var detachedSignatureCertificate = certificateSignInfo.GetMetadata("SupportsDetachedSignature");
                     bool detachedSignatureCertificateValue = false;
 
                     if (string.IsNullOrEmpty(macSigningOperation) != string.IsNullOrEmpty(macNotarizationAppName))