add runtimevariant

Author: matouskozak

eng/pipelines/extra-platforms/runtime-extra-platforms-linuxbionic.yml

@@ -40,6 +40,7 @@ jobs:
       testGroup: innerloop
       targetRid: linux-bionic-x64
       nameSuffix: AllSubsets_Mono_RuntimeTests
+      runtimeVariant: minijit
       buildArgs: -s mono+libs -c $(_BuildConfig)
       timeoutInMinutes: 480
       # extra steps, run tests
@@ -52,5 +53,3 @@ jobs:
           parameters:
             creator: dotnet-bot
             testRunNamePrefixSuffix: Mono_$(_BuildConfig)_LinuxBionic
-      extraVariablesTemplates:
-        - template: /eng/pipelines/common/templates/runtimes/test-variables.yml