fix(ember): Speed up ember scenarios

[k-fish]

It is running the scenarios in sequence, running them in parallel might speed up the builds a bit.

[k-fish]

This will hopefully drop times a bit, the setup seems to be where most the time is taking so this might be an Amdahl problem with installing reqs.

[lobsterkatie]

the setup seems to be where most the time is taking so this might be an Amdahl problem with installing reqs.

Correct me if I'm wrong, but I think part of why this is so slow is that it's running yarn on the entire monorepo in order to change ember versions. Is there a way for the test app to have a separate package.json from the main @sentry/ember one, so that it could be more restricted in its scope?

[k-fish]

running yarn on the entire monorepo

Yeah I'm pretty sure you're right. I'll take a look.

[AbhiPrasad]

@k-fish for now gonna merge this in cause of the perf improvements - we can take a look at more efficiently running yarn at a later point.