[flang] Add procedure pointer components for derived types

Also eliminate `derivedTypeData_`. Information about derived types needed
during name resolution is in `derivedTypeInfo_` and the permanent record
is the symbol table.

Original-commit: flang-compiler/f18@789960bd95d1a4c24650ff14950cb9faaa13c6aa
Reviewed-on: https://github.com/flang-compiler/f18/pull/175
Tree-same-pre-rewrite: false