modules/python: don't inherit from InterpreterObject
modules/python: don't inherit from InterpreterObject

Because ExternalProjectHolder already does

QuLogic/meson,pexip/meson,QuLogic/meson,QuLogic/meson,QuLogic/meson,pexip/meson,becm/meson,pexip/meson,becm/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,pexip/meson,becm/meson,QuLogic/meson,QuLogic/meson,jpakkane/meson,jpakkane/meson,mesonbuild/meson,becm/meson,mesonbuild/meson,mesonbuild/meson,becm/meson,becm/meson,pexip/meson,becm/meson,QuLogic/meson,QuLogic/meson,jpakkane/meson,mesonbuild/meson,pexip/meson,becm/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,mesonbuild/meson,becm/meson,jpakkane/meson,mesonbuild/meson,jpakkane/meson,jpakkane/meson,becm/meson,jpakkane/meson,pexip/meson,mesonbuild/meson,pexip/meson,QuLogic/meson,jpakkane/meson