* maint:
  Update test suite
  Also unwrap map_type_* name and value
  Add unwrap calls to map_field_* in erl_syntax

* zadean/syntax_tools/add_missing_unwrap/OTP-16012/PR-2348:
  Update test suite
  Also unwrap map_type_* name and value
  Add unwrap calls to map_field_* in erl_syntax

Add record with exact and associated map types to type_specs.erl. The
record forces the erl_parse format for map types to be retained.

Add test wrapped_subtrees to the test suite. It ensures that each
erl_parse node it encounters can be wrapped and accessed with
erl_syntax:subtrees/1 without error.

This adds missing calls to unwrap/1 for the map_field_* name and value functions and puts them inline with map_expr_fields/1.
Using these functions with "wrapped" nodes fails with badarg.

'cond' expressions were an experimental addition to the Erlang language
that never matured to the point that it could be incorporated to it.

This pull request takes out the (incomplete anyway) handling of 'cond'
expressions from the syntax_tools application, so as to simplify its
code base.

The added make target is described in HOWTO/TESTING.md.

This reverts commit 425889ba69b69a9b6fb14bfbef121d51b78e853a.