fix(cdk/scrolling): handle null document.body in ViewportRuler - #32477

rules:
master:
regex:
- /master/gilevel: noticealternatives:
- primary
- main
- leader
- active
- writerslave:
regex:
- /slave/gilevel: failurealternatives:
- secondary
- node
- worker
- replica
- passivewhitelist:
regex:
- /white[_-]*list/gilevel: failurealternatives:
- include list
- allow listblacklist:
regex:
- /black[_-]*list/gilevel: failurealternatives:
- exclude list
- deny listgrandfathered:
regex:
- /grandfathered/gilevel: 'off'alternatives:
- legacied
- exemptedsanity_check:
regex:
- /sanity[_-]*check/gilevel: 'off'alternatives:
- smoke test
- confidence checkman_hours:
regex:
- /man[_-]*hours/gilevel: 'off'alternatives:
- person-hours
- human-hoursignore:
- .github/in-solidarity.ymldefaultMessage: > Please consider an alternative to `{{match}}`.  {{#if alternatives~}} Possibilities include: {{#each alternatives}}{{#if @index}}, {{/if}}`{{this}}`{{/each}} {{~/if}}