[BUG] Missing pattern sentences in Pattern Matching in GOpt-based compilation

[BingqingLyu]

Describe the bug

Based on the new GOpt-based compilation stack, the following pattern outputs unexpected plan:

g.V().match(__.as("a").out("2..3", "KNOWS").endV().as("c"), __.as("a").out("KNOWS").as("c")).count()

Currently, the optimized plan only preserves the PathExpand operator ( for out("2..3","KNOWS") ), while miss out the EdgeExpand ( for out("KNOWS") ) operator.

The plan looks like:

      PhysicalOpr {
            opr: Scan(...)
        PhysicalOpr {
            opr: Repartition(...),
        },
        PhysicalOpr {
            opr: Path(...),
        },
        PhysicalOpr {
            opr: Vertex(...),
        },
        PhysicalOpr {
            opr: GroupBy(...),
        },
        PhysicalOpr {
            opr: Sink(...),
        }