[2.0.x] Add Z_AFTER_PROBING option (#10058)

Some "fix-mounted" probes need manual stowing. And after probing some may prefer to raise or lower the nozzle. This restores an old option but tailors it to allow raise or lower as preferred.

Marlin/src/module/probe.cpp

@@ -465,6 +465,16 @@ bool set_probe_deployed(const bool deploy) {
   return false;
 }
 
+#ifdef Z_AFTER_PROBING
+  // After probing move to a preferred Z position
+  void move_z_after_probing() {
+    if (current_position[Z_AXIS] != Z_AFTER_PROBING) {
+      do_blocking_move_to_z(Z_AFTER_PROBING);
+      current_position[Z_AXIS] = Z_AFTER_PROBING;
+    }
+  }
+#endif
+
 /**
  * @brief Used by run_z_probe to do a single Z probe move.
  *