SELECT query with FINAL clause on.a ReplacingMergeTree

SELECT query with FINAL clause on.a ReplacingMergeTree table with the is_deleted column now executes faster because of improved parallelization from two existing optimizations: 1. do_not_merge_across_partitions_select_final optimization for partitions of the table that have only a single part; 2. Split other selected ranges of the table into intersecting / non-intersecting and only intersecting ranges have to pass through FINAL merging transform. #88090 (Shankar Iyer).