Soft expects will still fail the test, but will not abort it's execution. As a consequence of this:
- `TestResult` now might have multiple errors, which is reflected with a new `testResult.erros: TestError[]` field.
- `TestInfo` now might have multiple errors as well, which is reflected with a new `testInfo.errors: TestError[]` field.
Fixes#7819
This prepares for beforeAll/afterAll hooks to be handled in the same way.
Since we do not know in advance whether a hook will run, we must create
TestResults lazily.
