fix(step-generation): fix blowout location from multi-dispense dispos…

…al (#17013)

closes RESC-356

This PR fixes a bug where the blowout tip position associated with a multi-dispense disposal was not properly wired up. This resulted in the blowout position to always be at the top of the well which caused users issues.

protocol-designer/src/steplist/formLevel/stepFormToArgs/moveLiquidFormToArgs.ts

@@ -166,7 +166,13 @@ export const moveLiquidFormToArgs = (
     'dispense_delay_mmFromBottom'
   )
   const blowoutLocation =
-    (fields.blowout_checkbox && fields.blowout_location) || null
+    (fields.blowout_checkbox && fields.blowout_location) ||
+    (fields.disposalVolume_checkbox &&
+      path === 'multiDispense' &&
+      fields.disposalVolume_volume &&
+      fields.blowout_location) ||
+    null
+
   const blowoutOffsetFromTopMm =
     blowoutLocation != null
       ? blowout_z_offset ?? DEFAULT_MM_BLOWOUT_OFFSET_FROM_TOP