[os.windows] vlib\os\os_test.c.v test fail

[kbkpbot]

Describe the bug

run v test on vlib\os\os_test.c.v will fail under windows

Reproduction Steps

v vlib\os\os_test.c.v

Expected Behavior

pass the test

Current Behavior

D:\v\v\v>"D:\v\v\v\v.exe"   -b c "D:\v\v\v\vlib\os\os_test.c.v"
testsuite_begin, tfolder = C:\Users\DDT\AppData\Local\Temp\v_0\os_tests
C:\Users\DDT\AppData\Local\Temp\v_0\os_tests\tolink_file.txt
D:\\v\\v\\v\\vlib\\os\\os_test.c.v:638: fn test_rmdir_not_exist
   > assert err.code() == 0x00000002
     Left value (len: 1): `0`
    Right value (len: 1): `2`

>>> os.Command is not implemented fully on Windows yet
skipping test_mv_by_cp, because bindfs was not present
skipping test_mv_by_cp, because bindfs was not present

Possible Solution

wrong use of C.GetLastError()

Additional Information/Context

No response

V version

V 0.4.10 af947f1.af947f1

Environment details (OS name and version, etc.)

V full version	V 0.4.10 af947f1.af947f1
OS	windows, Microsoft Windows 10 企业版 LTSC 19044 64 位
Processor	16 cpus, 64bit, little endian, AMD Ryzen 7 7840H with Radeon 780M Graphics
Memory	2.03GB/27.69GB
V executable	D:\v\v\v\v.exe
V last modified time	2025-04-29 11:51:58
V home dir	OK, value: D:\v\v\v
VMODULES	OK, value: C:\Users\DDT.vmodules
VTMP	OK, value: C:\Users\DDT\AppData\Local\Temp\v_0
Current working dir	OK, value: D:\v\v\v
Git version	git version 2.43.0.windows.1
V git status	weekly.2025.17-16-gaf947f1a-dirty
.git/config present	true
cc version	N/A
gcc version	N/A
clang version	N/A
msvc version	用于 x64 的 Microsoft (R) C/C++ 优化编译器 19.39.33523 版
tcc version	tcc version 0.9.28rc 2025-04-19_mob@36ff4f52* (x86_64 Windows)
tcc git status	N/A
emcc version	N/A
glibc version	N/A

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