Dont block CI if ui tests fail on VSC Insiders (microsoft#6426)

Author: DonJayamanne

build/ci/vscode-python-ci.yaml

@@ -28,7 +28,7 @@ jobs:
 - template: templates/uitest_jobs.yml
  parameters:
  # Test only against stable version of VSC.
- # vscodeChannels: ['stable']
+ vscodeChannels: ['stable']
  # Run only smoke tests against 3.7 and 2.7 (exclude others).
  jobs:
  - test: "Smoke"