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[syntax-errors] Star annotations before Python 3.11 (#16545)

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Summary
--

This is closely related to (and stacked on)
https://github.com/astral-sh/ruff/pull/16544 and detects star
annotations in function definitions.

I initially called the variant `StarExpressionInAnnotation` to mirror
`StarExpressionInIndex`, but I realized it's not really a "star
expression" in this position and renamed it. `StarAnnotation` seems in
line with the PEP.

Test Plan
--

Two new inline tests. It looked like there was pretty good existing
coverage of this syntax, so I just added simple examples to test the
version cutoff.
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Brent Westbrook 2025-03-14 11:20:44 -04:00 • committed by GitHub
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commit 6311412373
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crates/ruff_python_parser/resources/inline/ok/param_with_star_annotation_py311.py Normal file
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@ -0,0 +1,2 @@
# parse_options: {"target-version": "3.11"}
def foo(*args: *Ts): ...