fix the SAGA Points Distances tool

(cherry picked from commit b67ef4f)

Author: gioman

python/plugins/processing/algs/saga/description/DistanceMatrix.txt

@@ -1,9 +1,9 @@
 Point Distances
 shapes_points
 QgsProcessingParameterFeatureSource|POINTS|Points|0|None|False
-QgsProcessingParameterFeatureSource|ID_POINTS|Identifier|5|None|False
-QgsProcessingParameterFeatureSource|NEAR|Near Points|-1|None|True
-QgsProcessingParameterFeatureSource|ID_NEAR|Identifier|5|None|False
-QgsProcessingParameterFeatureSource|DISTANCES|Distances|5|None|False
+QgsProcessingParameterField|ID_POINTS|Identifier|None|POINTS|-1|False|False
+QgsProcessingParameterFeatureSource|NEAR|Near Points|0|None|True
+QgsProcessingParameterField|ID_NEAR|Identifier|None|NEAR|-1|False|True
 QgsProcessingParameterEnum|FORMAT|Output Format|[0] complete input times near points matrix;[1] each pair with a single record|False|1
 QgsProcessingParameterNumber|MAX_DIST|Maximum Distance|QgsProcessingParameterNumber.Double|0.000000|False|0.000000|None
+QgsProcessingParameterVectorDestination|DISTANCES|Distances|5|None|False