pub fn resolve_test_kernel() -> Result<PathBuf>Expand description
Find a kernel image for running tests.
Checks KTSTR_TEST_KERNEL env var first (direct image path),
then delegates to crate::find_kernel() for cache and
filesystem discovery. Returns a typed KernelUnavailable on
failure so the #[ktstr_test] macro wrapper can map it onto a
clean SKIP banner — generic anyhow errors propagate to the
panic arm and surface as confusing test failures when the
binary runs outside cargo ktstr test.