Consider better scoping for Outcome Mapping section of the rules format

[tombrunet]

Per discussion in the ACT Task Force meeting on July 21, 2022, we might consider adjusting the scope of the outcome mapping regarding 'passed' and 'inapplicable':
https://github.com/w3c/wcag-act/blob/main/act-rules-format.md

The rules generally report on pass, fail, cantTell, or inapplicable. The fail scenario is straight forward. The challenge with the other values is that you can't claim you pass an SC without passing all aspects of that SC for all elements on an entire page (or set of pages). Ideally, we'd find some wording that better scopes what 'pass' means - passes a particular aspect of the SC for the test target within the scope of the current rule. Would be ideal to have some better way to describe the impact of pass vs cantTell.