[release/2.1] Add switches for legacy signing (#17354)

* Add switches for legacy signing

Author: mmitche

buildpipeline/DotNet-CoreClr-Trusted-Windows-x86.json

@@ -18,7 +18,8 @@
         "signType": "real",
         "zipSources": "false",
         "version": "",
-        "feedSource": "https://devdiv.pkgs.visualstudio.com/DefaultCollection/_packaging/MicroBuildToolset/nuget/v3/index.json"
+        "feedSource": "https://devdiv.pkgs.visualstudio.com/DefaultCollection/_packaging/MicroBuildToolset/nuget/v3/index.json",
+        "legacySigning": "$(PB_UseLegacySigning)"
       }
     },
     {
@@ -339,6 +340,10 @@
       "value": "test",
       "allowOverride": true
     },
+    "PB_UseLegacySigning": {
+      "value": "false",
+      "allowOverride": true
+    },
     "TeamName": {
       "value": "DotNetCore"
     },

buildpipeline/DotNet-CoreClr-Trusted-Windows.json

@@ -18,7 +18,8 @@
         "signType": "real",
         "zipSources": "false",
         "version": "",
-        "feedSource": "https://devdiv.pkgs.visualstudio.com/DefaultCollection/_packaging/MicroBuildToolset/nuget/v3/index.json"
+        "feedSource": "https://devdiv.pkgs.visualstudio.com/DefaultCollection/_packaging/MicroBuildToolset/nuget/v3/index.json",
+        "legacySigning": "$(PB_UseLegacySigning)"
       }
     },
     {
@@ -345,6 +346,10 @@
       "value": "test",
       "allowOverride": true
     },
+    "PB_UseLegacySigning": {
+      "value": "false",
+      "allowOverride": true
+    },
     "TeamName": {
       "value": "DotNetCore"
     },

buildpipeline/DotNet-Trusted-Publish.json

@@ -18,7 +18,8 @@
         "signType": "real",
         "zipSources": "true",
         "version": "",
-        "feedSource": "https://devdiv.pkgs.visualstudio.com/DefaultCollection/_packaging/MicroBuildToolset/nuget/v3/index.json"
+        "feedSource": "https://devdiv.pkgs.visualstudio.com/DefaultCollection/_packaging/MicroBuildToolset/nuget/v3/index.json",
+        "legacySigning": "$(PB_UseLegacySigning)"
       }
     },
     {
@@ -692,6 +693,10 @@
     },
     "PB_BuildOutputManifestArguments": {
       "value": "/p:ManifestBuildId=$(OfficialBuildId) /p:ManifestBranch=$(SourceBranch) /p:ManifestCommit=$(SourceVersion)"
+    },
+    "PB_UseLegacySigning": {
+      "value": "false",
+      "allowOverride": true
     }
   },
   "retentionRules": [