Consider storing a `Box<[T]>` or shrink the tuple's inner `Vec'`s before wrapping them as `Type`

[MichaReiser]

Both FixedLengthTupleType and VariableLengthTupleType contain Vec<T> fields that we don't shrink before constructing a TupleTypeSpec (to my knowledge). This can result in increased memory usage because of the unused elements in those vecs.

https://github.com/astral-sh/ruff/blob/41207ec901340423d988b85dc8138e306f9a39c2/crates/ty_python_semantic/src/types/tuple.rs#L323

https://github.com/astral-sh/ruff/blob/41207ec901340423d988b85dc8138e306f9a39c2/crates/ty_python_semantic/src/types/tuple.rs#L540-L544