Merge pull request #21362 from mpashchenkov:mp/ocv-gapi-suppress-warn

G-API: Suppress ngraph warnings for MSVS2015 (4268)

* 4268 are suppressed

* 1900-->>1910 (v140)

* Two more warnings from ngraph include

modules/gapi/test/infer/gapi_infer_ie_test.cpp

@@ -29,6 +29,10 @@
 #elif defined(_MSC_VER)
 #pragma warning(push)
 #pragma warning(disable : 4100)
+# if _MSC_VER < 1910
+#  pragma warning(disable:4268) // Disable warnings of ngraph. OpenVINO recommends to use MSVS 2019.
+#  pragma warning(disable:4800)
+# endif
 #elif defined(__GNUC__)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-parameter"