[HMR] CSS: Provide a mechanism to register stylesheets

[ravijayaramappa]

Is your feature request related to a problem? Please describe.
Adding support for Hot Module Resolution(HMR) requires a registration process to hot swap component constructor, template and stylesheet. Today we have a mechanism to register a template and component constructor as trusted. This feature request is to provide a similar registration mechanism for StyleSheets.

When a new style is being registered for swap, it can be validated before being used.

Describe the solution you'd like
Provide a registerStyleSheet() API from 'lwc' module

Additional context
This requirement originated while reviewing this PR #1860

[nolanlawson]

Fixed by #3443

[nolanlawson]

This was merged and then reverted. It would be fixed by #3477.