Fix signing opt in/out (#47232)

Author: mmitche

eng/pipelines/templates/variables/vmr-build.yml

@@ -42,10 +42,10 @@ variables:
 - ${{ if eq(parameters.desiredSigning, 'Signed') }}:
   - name: signEnabled
     value: true
-- ${{ if eq(parameters.desiredSigning, 'Unsigned') }}:
+- ${{ elseif eq(parameters.desiredSigning, 'Unsigned') }}:
   - name: signEnabled
     value: false
-- ${{ if or(startsWith(parameters.desiredSigning, 'Default'), eq(parameters.desiredSigning, '')) }}:
+- ${{ elseif or(startsWith(parameters.desiredSigning, 'Default'), eq(parameters.desiredSigning, '')) }}:
   # Always sign on the public project (will be dry-run signing)
   - ${{ if eq(variables['System.TeamProject'], 'public') }}:
     - name: signEnabled

src/SourceBuild/content/eng/pipelines/ci.yml

@@ -151,6 +151,7 @@ extends:
       parameters:
         isBuiltFromVmr: true
         isSourceOnlyBuild: ${{ variables.isSourceOnlyBuild }}
+        desiredSigning: ${{ parameters.desiredSigning }}
         ${{ if eq(variables.isScheduleTrigger, 'true') }}:
           scope: full
         ${{ elseif eq(variables.isSourceOnlyBuildLite, 'true') }}: