[3.12] gh-108000: Test that `lambda` also has `__type_params__` (GH-108002) (#108019)

gh-108000: Test that `lambda` also has `__type_params__` (GH-108002)
(cherry picked from commit a8d440b3837273926af5ce996162b019290ddad5)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>