Co-Authored-By: ejtagle <ejtagle@hotmail.com>

Enable the endstop interrupts feature for LPC176x boards. Although Smoothieboard chose to use non-interrupt capable pins for their endstops, and this has been copied by clones, so they can't use it.

* Fix LCD_LANGUAGE options list formatting in config
* Remove 'cn' language option from list

Fix #11183

See #11097

* Fix G29 (ABL) retry behavior

To allow for the case where a Z endstop (e.g., hall effect) is higher than the probe trigger point, don't check the Z min endstop during probe moves. See #11134

- Allow planner to alter the deceleration phase of the currently executing block.
- Remove BUSY flag, as it is NON ATOMIC to set bits in the Stepper ISR and Planner at the same time.