Merge branch 'v1.5' into v2.2

Author: AArnott

azure-pipelines/microbuild.before.yml

@@ -7,7 +7,7 @@ steps:
     ShouldSkipOptimize: $(ShouldSkipOptimize)
   displayName: Install OptProf Plugin
 
-- task: MicroBuildSigningPlugin@1
+- task: MicroBuildSigningPlugin@2
   inputs:
     signType: $(SignType)
     zipSources: false