Update statx constants and types (Linux 6.8-6.14)

[rusty-snake]

Description

This PR updates statx constants and types for features added in Linux 6.8 to 6.14.

Sources

• https://github.com/torvalds/linux/blob/3bde70a2c82712f05c7220b8b94fc2cbdf7fbfe0/include/uapi/linux/stat.h#L168-L186
• https://github.com/torvalds/linux/blob/3bde70a2c82712f05c7220b8b94fc2cbdf7fbfe0/include/uapi/linux/stat.h#L213-L217
• https://github.com/torvalds/linux/blob/3bde70a2c82712f05c7220b8b94fc2cbdf7fbfe0/include/uapi/linux/stat.h#L253

Checklist

• Relevant tests in libc-test/semver have been updated
• No placeholder or unstable values like *LAST or *MAX are
  included (see #3131)
• Tested locally (cd libc-test && cargo test --target mytarget);
  especially relevant for platforms that may not be checked in CI

---

@rustbot label +stable-nominated

[rustbot]

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