Disable transitive P2Ps when building scenario-tests standalone (#1105)

Author: ViktorHofer

repo-projects/scenario-tests.proj

@@ -15,6 +15,7 @@
          as the scenario tests repo needs to be capable of being built by itself in a standalone validation job.
          This also requires the use of bootstrap arcade. -->
     <SkipScenarioTestsDependencies Condition="'$(DotNetSourceOnlyTestOnly)' == 'true'">true</SkipScenarioTestsDependencies>
+    <DisableTransitiveProjectReferences Condition="'$(SkipScenarioTestsDependencies)' == 'true'">true</DisableTransitiveProjectReferences>
     <UseBootstrapArcade Condition="'$(SkipScenarioTestsDependencies)' == 'true'">true</UseBootstrapArcade>
   </PropertyGroup>