Implement onLabelUpdate method. This change will implement the onLabelUpdate method by calling from every TextureStorage object. Instead of using setDebugName, introduced two new functions, setInternalName and setKHRDebugLabel, which will set the internal name and KHR label respectively that will further be sent to D3D string. Bug: chromium:1164111 Change-Id: I401ca9f6e8a2099a8807f0d7f321efe74269f9f0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3067921 Reviewed-by: Rafael Cintron <rafael.cintron@microsoft.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com>