separate vmr sync from installer ci

.vsts-ci.yml

@@ -10,13 +10,6 @@ trigger:
     - internal/release/6.*
     - internal/release/7.*
 
-resources:
-  repositories:
-  - repository: vmr
-    type: github
-    name: dotnet/dotnet
-    endpoint: dotnet
-
 parameters:
 - name: vmrBranch
   displayName: dotnet/dotnet branch to push to
@@ -379,17 +372,6 @@ stages:
       vmrBranch: ${{ variables.VmrBranch }}
       isBuiltFromVmr: false
 
-# In case the VMR Build stage is temporarily disabled, the VMR synchronization step is run to validate
-# that the PR can be merged and later synchronized into the VMR without problems.
-- ${{ else }}:
-  - stage: Synchronize_VMR
-    displayName: Synchronize VMR
-    dependsOn: []
-    jobs:
-    - template: eng/pipelines/templates/jobs/vmr-synchronization.yml
-      parameters:
-        vmrBranch: ${{ variables.VmrBranch }}
-
 - ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}:
   - stage: Publish
     dependsOn:

eng/pipelines/vmr-sync.yml

@@ -0,0 +1,38 @@
+trigger:
+  batch: true
+  branches:
+    include:
+    - main
+    - master
+    - release/*
+
+resources:
+  repositories:
+  - repository: vmr
+    type: github
+    name: dotnet/dotnet
+    endpoint: dotnet
+
+parameters:
+- name: vmrBranch
+  displayName: dotnet/dotnet branch to push to
+  type: string
+  default: ''
+
+variables: 
+  - ${{ if ne(parameters.vmrBranch, '') }}:
+    - name: VmrBranch
+      value: ${{ parameters.vmrBranch }}
+  - ${{ else }}:
+    - name: VmrBranch
+      value: ${{ replace(replace(variables['Build.SourceBranch'], 'refs/heads/', ''), 'refs/pull/', '') }}
+    
+stages:
+- stage: Synchronize_VMR
+  displayName: Synchronize VMR
+  dependsOn: []
+  jobs:
+  - template: /eng/pipelines/templates/jobs/vmr-synchronization.yml
+    parameters:
+      vmrBranch: ${{ variables.VmrBranch }}
+