[2.0.x] add Calibrate Z (M915) to Prepare Menu (#11331)

Marlin/src/lcd/language/language_an.h

Marlin/src/lcd/language/language_bg.h

Marlin/src/lcd/language/language_ca.h

Marlin/src/lcd/language/language_cz.h

Marlin/src/lcd/language/language_da.h

Marlin/src/lcd/language/language_de.h

Marlin/src/lcd/language/language_el-gr.h

Marlin/src/lcd/language/language_el.h

Marlin/src/lcd/language/language_en.h

Marlin/src/lcd/language/language_es.h

Marlin/src/lcd/language/language_eu.h

Marlin/src/lcd/language/language_fi.h

Marlin/src/lcd/language/language_fr.h

Marlin/src/lcd/language/language_gl.h

Marlin/src/lcd/language/language_hr.h

Marlin/src/lcd/language/language_it.h

Marlin/src/lcd/language/language_jp-kana.h

Marlin/src/lcd/language/language_nl.h

Marlin/src/lcd/language/language_pl.h

Marlin/src/lcd/language/language_pt-br.h