[Bug] Failure to start ephemeral server prevents shutdown of the process

[mjameswh]

Describe the bug

We regularly see patterns like the following in our CI; I presume this also affects users. The cause of the failure to start an ephemeral server isn't important (in this case, trying to use the time skipping server on Linux ARM, which isn't supported).

integration-workflows › before hook
Rejected promise returned by test. Reason:
UnexpectedError {
  message: 'Failed to start ephemeral server: HTTP status client error (404 Not Found) for url (https://temporal.download/temporal-test-server/default?arch=arm64&platform=linux&sdk-name=sdk-typescript&sdk-version=1.10.1)',
}

integration-workflows › after.always hook
Rejected promise returned by test. Reason:
TypeError {
  message: 'Cannot read properties of undefined (reading \'teardown\')',
}
› <anonymous> (src/helpers-integration.ts:89:30)

...then process never completes shutdown