[IE][VPU][GT]: Introduce Split by dynamic dimension check (#2802)

[IE][VPU][GT]: Introduce Split by dynamic dimension check (#2802)

* [IE][VPU][GT]: Introduce Split by dynamic dimension check

At the moment, myriad plugin does not support split operation
by dynamic axis. To be sure there is no issue with optimized-out
split operation which should have been replaced with copy
stage - assertion before DTS transformation is introduced.

Check should be performed before loop with DTS transformations
because it requires dynamic context (dynamic dimension should be
visible as dynamic), otherwise dynamic dimension would be
replaced with upper-bound estimation and check will always pass.

Signed-off-by: Gladilov, Gleb <gleb.gladilov@intel.com>
* [IE][nGraph]: Fixes normalize_axis symbol exporting

Signed-off-by: Gladilov, Gleb <gleb.gladilov@intel.com>