Extend test generation tool and gtest (added as part of https://bugs.openjdk.org/browse/JDK-8339507) to handle Intel APX NDD/NF instructions.

Intel Advanced Performance Extensions (APX) adds non destructive destination (NDD) and no flags (NF) flavor for the scalar instructions through EVEX encoding. For more information about APX, see https://www.intel.com/content/www/us/en/developer/articles/technical/advanced-performance-extensions-apx.html.