Function islet_verify 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn islet_verify(
    report: *const c_uchar,
    report_len: c_int,
    claims_out: *mut c_uchar,
    claims_out_len: *mut c_int,
) -> islet_status_t

Verify the attestation report and returns attestation claims if succeeded.