[build] update nightly CI triggers (#6313)

Context: https://docs.microsoft.com/azure/devops/pipelines/yaml-schema

Our nightly build is currently building all `release/*` branches.

Let's update this to ignore past preview branches.

Let's also update the VS branches this runs against.

build-tools/automation/azure-pipelines-nightly.yaml

@@ -14,8 +14,11 @@ schedules:
  branches:
  include:
  - main
- - d16-9
+ - d16-11
+ - d17-0
  - release/*
+ exclude:
+ - release/6.0.1xx-preview*
 
 # External sources, scripts, tests, and yaml template files.
 resources: