Change ``plotting`` target for ``graphics`` target

[RobPasMue]

Following internal discussions and general ecosystem trends, we are pushing for all libraries to have the same graphics target. Please deprecate the current plotting one in favor of graphics

ansys/pyansys-dev-guide#577

You can see an example here: ansys/pyacp#797

[RobPasMue]

@moe-ad -- could you please handle this?

[moe-ad]

Noted @RobPasMue.