preserve old functionality for PositionReference

Author: ryanthecoder

api/src/opentrons/protocol_api/core/engine/transfer_components_executor.py

@@ -1010,7 +1010,7 @@ def absolute_point_from_position_reference_and_offset(
                     # assume meniscus is at well center.
                     # Will this cause more harm than good? Is there a better alternative to this?
                     reference_point = well.get_center()
-            case PositionReference.LIQUID_MENISCUS_END:
+            case PositionReference.LIQUID_MENISCUS_END | PositionReference.LIQUID_MENISCUS:
                 estimated_liquid_height = well.estimate_liquid_height_after_pipetting(
                     mount=mount,
                     operation_volume=well_volume_difference,

shared-data/python/opentrons_shared_data/liquid_classes/liquid_class_definition.py

@@ -61,6 +61,8 @@ class PositionReference(Enum):
     WELL_CENTER = "well-center"
     LIQUID_MENISCUS_START = "liquid-meniscus-start"
     LIQUID_MENISCUS_END = "liquid-meniscus-end"
+    #Same as liquid meniscus end
+    LIQUID_MENISCUS = "liquid-meniscus"
 
 
 class BlowoutLocation(Enum):