fix(jest-circus) correct concurrent event ordering

[madcapnmckay]

Summary

I'm unsure if this is a major, minor, or patch change. It does not change the API, but it changes the order of events emitted from jest-circus

Fixes the issue documented here.

When using test.concurrent events such as test_start test_started and test_fn_start would execute after the body of the test. This was due to the _runTest not being executed as part of the parallel execution runner instead it was executed synchronously like non-concurrent tests.

The solution was to use _runTest within startTestsConcurrently() and then wait on that process to complete instead of replacing the test.fn as was being done before.

Test plan

• Run yarn test packages/jest-circus/src/__tests__/baseTest.test.ts at commit 8175d9f` to observe the snapshot content for the concurrent test.
• Checkout a2fd8c7, rerun yarn test packages/jest-circus/src/__tests__/baseTest.test.ts and note that the output has been reordered to match the expectation that the circus actions occur before and after the test execution.

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• ✅ login: madcapnmckay / name: Ian Mckay (8175d9f, a2fd8c7, 0a3d06c, 146fa15)

[madcapnmckay]

Question: should this be going into main? I originally branched off of v29.7.0

[SimenB]

@madcapnmckay main is correct 🙂 I see there's a bunch of test failures here, tho

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