Handle vector.View in the over operator (#5534)

I overlooked this in #5327.

runtime/vam/op/over.go

@@ -69,6 +69,8 @@ func (o *Over) flatten(vec vector.Any, slot uint32) vector.Any {
 	switch vec := vector.Under(vec).(type) {
 	case *vector.Dynamic:
 		return o.flatten(vec.Values[vec.Tags[slot]], vec.TagMap.Forward[slot])
+	case *vector.View:
+		return o.flatten(vec.Any, vec.Index[slot])
 	case *vector.Array:
 		return flattenArrayOrSet(vec.Values, vec.Offsets, slot)
 	case *vector.Set:

runtime/sam/op/traverse/ztests/nested-over-tail-head.yaml → runtime/ztests/op/over-nested-tail-head.yaml

@@ -5,6 +5,8 @@ zed: |
     )
   )
 
+vector: true
+
 input: |
   [[1,2,3],[4,5,6]]
   [[7,8,9]]

runtime/sam/op/traverse/ztests/nested-where-head.yaml → runtime/ztests/op/over-nested-where-head.yaml

@@ -5,6 +5,8 @@ zed: |
     )
   )
 
+vector: true
+
 input: |
   [[1,2],[3,4]]
   [[4,3],[2,1]]

runtime/sam/op/traverse/ztests/nested-where.yaml → runtime/ztests/op/over-nested-where.yaml

@@ -5,6 +5,8 @@ zed: |
     )
   )
 
+vector: true
+
 input: |
   [[1,2],[3,4]]
   [[4,3],[2,1]]