Support for Cypress Cloud

[brettz9]

Is your feature request related to a problem? Please describe.

Getting test results from Cypress Cloud is excellent, but if taking advantage of multiple containers, I cannot apparently get aggregated coverage results.

Describe the solution you'd like

A way for coverage to be aggregated across container instances.

Describe alternatives you've considered

Run locally or use a single container only, but these do not let me take advantage of parallel tests.

Additional context
N/A