Allow positive Z nozzle to probe offset (MarlinFirmware#20344)

* Allow a positive value for z offset from nozzle to probe without sanity checks
* Simplify menu_probe_offset.cpp (HOMING_Z_WITH_PROBE)
* Add some more explanation to Configuration Files
* Raise after probe_at_point as if homed

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>
Co-authored-by: Jason Smith <jason.inet@gmail.com>

Marlin/Configuration.h

@@ -947,10 +947,20 @@
 /**
  * Nozzle-to-Probe offsets { X, Y, Z }
  *
- * - Use a caliper or ruler to measure the distance from the tip of
+ * X and Y offset
+ *   Use a caliper or ruler to measure the distance from the tip of
  *   the Nozzle to the center-point of the Probe in the X and Y axes.
+ * 
+ * Z offset
  * - For the Z offset use your best known value and adjust at runtime.
- * - Probe Offsets can be tuned at runtime with 'M851', LCD menus, babystepping, etc.
+ * - Common probes trigger below the nozzle and have negative values for Z offset.
+ * - Probes triggering above the nozzle height are uncommon but do exist. When using
+ *   probes such as this, carefully set Z_CLEARANCE_DEPLOY_PROBE and Z_CLEARANCE_BETWEEN_PROBES
+ *   to avoid collisions during probing.
+ * 
+ * Tune and Adjust
+ * -  Probe Offsets can be tuned at runtime with 'M851', LCD menus, babystepping, etc.
+ * -  PROBE_OFFSET_WIZARD (configuration_adv.h) can be used for setting the Z offset.
  *
  * Assuming the typical work area orientation:
  *  - Probe to RIGHT of the Nozzle has a Positive X offset