Per-worker setup/teardown

[eyalroth]

Summary

Implements #8708, and also brings us closer to implement #7184.

Instead of modifying anything with the current globalSetup/Teardown, the PR adds new options globalSetupPerWorker and globalTeardownPerWorker.

If both setup configurations are defined (i.e globalSetup and globalSetupPerWorker) then both will be executed (the former only once, the latter once per worker).

The changes can be largely divided into:

• Additional e2e test files (most of the changes)
• Addition of the new configuration options
• Moving of runGlobalHook.ts from jest-core to jest-runner
• Actual implementation in jest-runner and jest-worker

I recommend reviewing the PR by going commit by commit.

Test plan

Added multiple e2e tests.

The e2e tests for "per worker" are fairly similar to the "global" ones.

There are also e2e tests for combination of "per worker" and "global" .

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commit: 228d7b6

[eyalroth]

@cpojer mind taking a look?

It's still missing release notes and full documentation. I will add that later.