Merge bitcoin/bitcoin#34705: kernel: Use fs:: namespace and unicode path in kernel tests

89386e700e kernel: Use fs:: namespace and unicode path in kernel tests (sedited)

Pull request description:

  Add support for unicode characters in paths to the kernel tests by using our fs:: wrappers for std::filesystem calls and adding the windows application manifest to the binary. This exercises their handling through the kernel API.

ACKs for top commit:
  hebasto:
    ACK 89386e700e.
  w0xlt:
    ACK 89386e700e

Tree-SHA512: 7b541f482d84a66c89eec63aea0e7f7626bbbd62082ad7a7fb2c7a517296c291a6ff301c628e5e9e1d7b850ead89005141481a2bfd06d8a9081622e32f7340cc

.github/ci-windows-cross.py

@@ -44,7 +44,6 @@ def check_manifests():
     skipped = {  # Skip as they currently do not have manifests
         "fuzz.exe",
         "bench_bitcoin.exe",
-        "test_kernel.exe",
     }
     for entry in release_dir.iterdir():
         if entry.suffix.lower() != ".exe":

.github/ci-windows.py

@@ -109,7 +109,6 @@ def check_manifests(ci_type):
         "fuzz.exe",
         "bench_bitcoin.exe",
         "test_bitcoin-qt.exe",
-        "test_kernel.exe",
         "bitcoin-chainstate.exe",
     }
     for entry in release_dir.iterdir():