This works around a known glitch in windows where directory entry stat
doesn't match its corresponding file stat (namely times don't). It
consolidates more test files, in the process, to ensure we are more
likely to trigger issues like this earlier.
Future work will finish the last couple places where we still use go's
fstest.MapFS internally, as well introduce stat tests at the syscallfs
abstraction: right now, most tests are still only defined in WASI.
Signed-off-by: Adrian Cole <adrian@tetrate.io>
3fc5392570