Add ProjectRemoveRule to pre-processing program of materialization substitution

In VolcanoPlanner, we apply a simple pre-processing hep program to normalize the "target" and "query" rels before materialization substitution. Currently this program runs with two rules: FilterProjectTransposeRule and ProjectMergeRule.
We need an extra rule ProjectRemoveRule for the Phoenix use case where a secondary index (modeled as materialized views) is defined on a view so the materialized view "queryRel" may have an identity projection introduced by this view.