Support manual loc builds creating a PR (#46278)

- we sometimes want / need to get a new loc PR faster than the schedule

Author: dougbu

.azure/pipelines/localization.yml

@@ -15,6 +15,13 @@ schedules:
 pr: none
 trigger: none
 
+parameters:
+# Choose whether manual builds should create a loc PR. This parameter value is ignored for scheduled builds.
+- name: createPr
+  default: false
+  displayName: Create a OneLocBuild pull request?
+  type: boolean
+
 variables:
 - name: _TeamName
   value: AspNetCore
@@ -23,7 +30,7 @@ jobs:
 - ${{ if and(ne(variables['System.TeamProject'], 'public'), or(eq(variables['Build.SourceBranch'], 'refs/heads/main'), eq(variables['Build.Reason'], 'Manual'))) }}:
   - template: /eng/common/templates/job/onelocbuild.yml
     parameters:
-      CreatePr: ${{ ne(variables['Build.Reason'], 'Manual') }}
+      CreatePr: ${{ or(ne(variables['Build.Reason'], 'Manual'), eq(parameters.createPr, 'true')) }}
       LclPackageId: 'LCL-JUNO-PROD-ASPNETCORE'
       LclSource: lclFilesFromPackage
       MirrorRepo: aspnetcore