Move env var in pipeline

Author: RikkiGibson

azure-pipelines.yml

@@ -72,10 +72,10 @@ stages:
 - stage:
   displayName: Test Linux (.NET 8)
   dependsOn: []
-  variables:
-    RoslynSkipTestFileBasedPrograms: 'true'
   jobs:
   - template: azure-pipelines/test-matrix.yml
+    variables:
+      RoslynSkipTestFileBasedPrograms: 'true'
     parameters:
       os: linux
       # Prefer the dotnet from the container.
@@ -90,10 +90,10 @@ stages:
 - stage:
   displayName: Test Linux (.NET 9)
   dependsOn: []
-  variables:
-    RoslynSkipTestFileBasedPrograms: 'true'
   jobs:
   - template: azure-pipelines/test-matrix.yml
+    variables:
+      RoslynSkipTestFileBasedPrograms: 'true'
     parameters:
       os: linux
       # Prefer the dotnet from the container.