libarchive: Do not use nanosecond file time APIs on macOS < 10.13

The SDK for macOS 10.13 adds `futimens` and `utimensat` so our checks
for these symbols may pass.  However, the symbols are not available at
runtime on older macOS versions.  Instead on macOS we can check for
availability based on the deployment target version.

Issue: #17101
27 jobs for libarchive-macos-nanosecond
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