Update latest Sysman headers and some fix in sysman ULTs

This change contains:
 - Update the sysman headers as per latest spec.
 - Use mock file descriptor 0 in Sysman ULTs:
   Lets use 0 as mock file descriptor in sysman ULTs.
   Because upon creation of a process in linux, by default file
   descriptors 0, 1 and 2 are assigned to it.
   Thus in /proc/<pid>/fd/ , there will be entries 0, 1 and 2.
   By using 0 as fd, we will be sure, that call getFileName() in
   LinuxSysmanImp::init() would succeed for ULT, because entry
   /proc/<pid>/fd/0 would certainly be found in filesystem.

Change-Id: I1576e2bfc8b96a408294362ccaf9f289b2b84e69
Signed-off-by: Jitendra Sharma <jitendra.sharma@intel.com>

level_zero/tools/test/unit_tests/sources/sysman/mock_sysman_fixture.h

@@ -23,10 +23,9 @@ using namespace NEO;
 
 namespace L0 {
 namespace ult {
-
+constexpr int mockFd = 0;
 class SysmanMockDrm : public Drm {
   public:
-    const int mockFd = 33;
     SysmanMockDrm(RootDeviceEnvironment &rootDeviceEnvironment) : Drm(std::make_unique<HwDeviceId>(mockFd, ""), rootDeviceEnvironment) {}
 };