Use --verbosity to toggle between spinner and verbose Ginkgo output

[xrstf]

Currently hydrophone uses a spinner to indicate something is going on. This is, I think, because Ginkgo's default output is one long line, so the line-based log reading hydrophone does waits "forever" and no progress is visible.

Since there is already a --verbosity flag, I was wondering if it could be used to toggle between

• v <=4: show the spinner, like it is right now
• v >= 6: do not show the spinner, but configure E2E_EXTRA_GINKGO_ARGS=-v, which will lead to more line-based output.

Currently, setting the -v arg on Ginkgo by hacking hydrophone looks like

So a way to disable the spinner in favor of more verbose output would be nice.