Only run the full compliance nightly (#2701)

Author: mattleibow

scripts/azure-templates-stages.yml

@@ -913,7 +913,7 @@ stages:
             installEmsdk: true
             initScript: source ~/emsdk/emsdk_env.sh
 
-  - ${{ if and(eq(variables['System.TeamProject'], 'devdiv'), ne(parameters.buildPipelineType, 'tests'), ne(variables['System.PullRequest.IsFork'], 'true'), or(eq(variables['Build.SourceBranch'], 'refs/heads/main'), startsWith(variables['Build.SourceBranch'], 'refs/heads/release/'), parameters.runCompliance)) }}:
+  - ${{ if and(eq(variables['System.TeamProject'], 'devdiv'), ne(parameters.buildPipelineType, 'tests'), ne(variables['System.PullRequest.IsFork'], 'true'), or(and(eq(variables['Build.Reason'], 'Schedule'), or(eq(variables['Build.SourceBranch'], 'refs/heads/main'), startsWith(variables['Build.SourceBranch'], 'refs/heads/release/'))), parameters.runCompliance)) }}:
     - template: security/full/v1.yml@xamarin-templates
       parameters:
         stageDependsOn: