Unhandled exceptions in `pytest_unconfigure` hooks exit `1` and not `3` - `ExitCode.INTERNAL_ERROR`

Hi, as (briefly) discussed in this discussion, pytest_unconfigure differs from pytest_configure in terms of exiting.

When a pytest_configure(...) implementation raises an unhandled exception; pytest exits 3 - ExitCode.INTERNAL_ERROR; this is outlined below:

# conftest.py
import pytest

@pytest.hookimpl
def pytest_configure(config: pytest.Config):
    raise Exception("Unhandled exception; exit will be 3.")

# test_foo.py

def test_foo():
    assert True

pytest .
echo $?
3

However; the reverse is not true, an unhandled exception in the pytest_unconfigure(...) cases forces pytest to exit 1 instead.

# conftest.py
import pytest

@pytest.hookimpl
def pytest_configure(config: pytest.Config) -> None:
    raise Exception("Unhandled exc; exit will be 3.")


@pytest.hookimpl
def pytest_unconfigure(config: pytest.Config) -> None:
    raise Exception("No internal error here; pytest will exit 1")

# test_foo.py

def test_foo():
    assert True

and a 1 exit code:

    raise Exception("No internal error here; pytest will exit 1")
Exception: No internal error here; pytest will exit 1
(venv)  ✘ sy  ~/PycharmProjects/pythonProject45  echo $?
1

Reproduce the issue using the conftest.py and test_foo.py examples, comparing pytest_configure and pytest_unconfigure exception handling and their exit codes. Trace the hook handling and add a regression test showing that an unhandled pytest_unconfigure exception exits with ExitCode.INTERNAL_ERROR (3), then run the relevant test suite.