Fix assert during compact IDs pass (#1649)

During the compact IDs optimization pass, the result IDs of some
basic blocks can change. In spite of this, GetPreservedAnalyses
indicated that the CFG was preserved. But the CFG relies on
the basic blocks having the same IDs. Simply removing this flag
resolves the issue by preventing the CFG check.

Also Removes combinators and namemap preserved analyses from
compact IDs pass.