test_runner: allow nesting test within describe
Fixes: https://github.com/nodejs/node/issues/46478
although initially test
and describe
were not meant to be used together I see no reason why not to allow this,
as the use case demonstrated in https://github.com/nodejs/node/issues/46478#issuecomment-1420588544 is valid.
additionally, other test runners such as playwright and mocha also support this.
another outcome of this change is that running a nested test
within test
will now work the same way t.test
did previously, wich sounds reasonable to me as well