`.pyi` files are not discovered when running on a folder

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Bug description

# asdf/foo.py
foo = 1

# asdf/bar.pyi
foo = 1

Configuration

No response

Command used

pylint asdf

Pylint output

************* Module foo
asdf\foo.py:1:0: C0104: Disallowed name "foo" (disallowed-name)
asdf\foo.py:1:0: C0104: Disallowed name "foo" (disallowed-name)

Expected behavior

************* Module foo
asdf\foo.py:1:0: C0104: Disallowed name "foo" (disallowed-name)
asdf\foo.py:1:0: C0104: Disallowed name "foo" (disallowed-name)
asdf\bar.pyi:1:0: C0104: Disallowed name "foo" (disallowed-name)
asdf\bar.pyi:1:0: C0104: Disallowed name "foo" (disallowed-name)

Pylint version

pylint 3.0.0a7
astroid 3.0.0
Python 3.11.2 (tags/v3.11.2:878ead1, Feb  7 2023, 16:38:35) [MSC v.1934 64 bit (AMD64)]

OS / Environment

windows 10

Additional dependencies

No response