Special-case == Python version request ranges

[zanieb]

Related to #9695

Doesn't solve the reported issue with requires-python because that doesn't go through the parser

uv/crates/uv/src/commands/project/mod.rs

Lines 518 to 526 in 6ed6fc1

	let request = requires_python
	.as_ref()
	.map(RequiresPython::specifiers)
	.map(|specifiers| {
	PythonRequest::Version(VersionRequest::Range(
	specifiers.clone(),
	PythonVariant::Default,
	))
	});