TEMP test against system tests

Author: andrewlock

.azure-pipelines/ultimate-pipeline.yml

@@ -4616,7 +4616,7 @@ stages:
             versionSpec: '3.12'
           displayName: Install python 3.12
 
-        - script: git clone --depth 1 https://github.com/DataDog/system-tests.git
+        - script: git clone --depth 1 --branch mtoff/dotnet-enhanced-config-2 https://github.com/DataDog/system-tests.git
           displayName: Get system tests repo
 
         - script: |