Show Build Event streams on the correlated invocations view

Description

Now that BuildGrid provides a way to query event streams published by build tools such as Bazel (buildgrid!714 (merged)), we should make use of that information in bgd-browser.

All the streams can be mapped to a specific correlated invocations ID, so rendering the data in a human-readable way on the correlated invocations view is the simplest way to start getting value from this new functionality.