tests: `test_strict_yaml::test_exceptions` failing on CI

[skshetry]

See https://github.com/iterative/dvc/runs/5000170109?check_suite_focus=true#step:7:11107

The failures are consistent, and is only happening on CI. I am not able to reproduce locally.

FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[duplicate_keys]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[no_hyphen_block]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[unclosed_scalar]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[empty_stage] - a...
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[missing_cmd] - a...
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[deps_as_dict] - ...
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[outs_as_str] - a...
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[null_value_on_outs]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[additional_key_on_outs]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[foreach_scalar]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[foreach_do_do_null]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[foreach_do_missing_cmd]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[foreach_unknown_cmd_missing_do]
FAILED tests/func/utils/test_strict_yaml.py::test_exceptions[merge_conflicts]

[dtrifiro]

It's due to rich. Tests fail with rich 11.1.0 but succeed with 11.0.0

pip install rich==11.0.0
pytest tests/func/utils/test_strict_yaml.py

pip install rich==11.1.0
pytest tests/func/utils/test_strict_yaml.py # this fails

[dtrifiro]

Related this commit in particular Textualize/rich@0a37fcc