Implements stat device/inode on WASI and GOOS=js

[codefromthecrypt]

This implements stat device and inode for WASI and GOOS=js, though it does not implement the host side for windows, yet. Doing windows requires plumbing as the values needed aren't exposed in Go. When we re-do the syscallfs file type to have a stat method, we can address that glitch. Meanwhile, I can find no Go sourcebase that does any better, though the closest is the implementation details of os.SameFile.

I verified this with wasi-testsuite which now passes all but 1 case which is unrelated (we haven't yet implemented fd_tell).

$ python3 test-runner/wasi_test_runner.py -t ./tests/assemblyscript/testsuite/  ./tests/c/testsuite/ -r adapters/wazero.sh
Test environ_get-multiple-variables passed
Test fd_write-to-invalid-fd passed
Test environ_sizes_get-multiple-variables passed
Test args_sizes_get-no-arguments passed
Test proc_exit-success passed
Test proc_exit-failure passed
Test args_get-multiple-arguments passed
Test args_sizes_get-multiple-arguments passed
Test fd_write-to-stdout passed
Test random_get-non-zero-length passed
Test environ_sizes_get-no-variables passed
Test random_get-zero-length passed
Test lseek failed
  [exit_code] 0 == 1
STDOUT:

STDERR:
+ exec wazero run -hostlogging=filesystem -mount=/Users/adrian/oss/wasi-testsuite/tests/c/testsuite:/ /Users/adrian/oss/wasi-testsuite/tests/c/testsuite/lseek.wasm
==> wasi_snapshot_preview1.fd_prestat_get(fd=3)
<== (prestat={pr_name_len=1},errno=ESUCCESS)
==> wasi_snapshot_preview1.fd_prestat_dir_name(fd=3)
<== (path=/,errno=ESUCCESS)
==> wasi_snapshot_preview1.fd_prestat_get(fd=4)
<== (prestat=,errno=EBADF)
==> wasi_snapshot_preview1.fd_fdstat_get(fd=3)
<== (stat={filetype=DIRECTORY,fdflags=,fs_rights_base=,fs_rights_inheriting=},errno=ESUCCESS)
==> wasi_snapshot_preview1.path_open(fd=3,dirflags=SYMLINK_FOLLOW,path=fs-tests.dir/lseek.txt,oflags=,fs_rights_base=,fs_rights_inheriting=,fdflags=)
<== (opened_fd=4,errno=ESUCCESS)
==> wasi_snapshot_preview1.fd_read(fd=4,iovs=69712,iovs_len=2)
<== (nread=8,errno=ESUCCESS)
==> wasi_snapshot_preview1.fd_seek(fd=4,offset=-4,whence=1,result.newoffset=69720)
<== errno=ESUCCESS
--> wasi_snapshot_preview1.fd_tell(fd=4,result.offset=69720)
<-- errno=ENOSYS
Assertion failed: lseek(fd, 0, SEEK_CUR) == 4 (testsuite/lseek.c: main: 22)
error instantiating wasm binary: module[] function[_start] failed: wasm error: unreachable
wasm stack trace:
	.abort()
	.__assert_fail(i32,i32,i32,i32)
	.__original_main() i32
	._start()

Test clock_getres-realtime passed
Test clock_gettime-monotonic passed
Test clock_getres-monotonic passed
Test fopen-with-access passed
Test stat-dev-ino passed
Test fdopendir-with-access passed
Test clock_gettime-realtime passed
Test pwrite-with-access passed
Test fopen-with-no-access passed
Test pread-with-access passed

===== Test results =====
Runtime: wazero v0.0.0
Suite: WASI Assemblyscript tests
  Total: 12
  Passed:  12
  Failed:  0

Suite: WASI C tests
  Total: 11
  Passed:  10
  Failed:  1

Test suites: 1 failed, 1 passed, 0 total
Tests:       1 failed, 22 passed, 0 total