Make argument names in module interface more consistent.

Make argument names in module interface more consistent.

Previously, the names of arguments and other details were needlessly
inconsistent between the documentation, the declarations, and the
definitions, as well as between each other.  This commit makes them
more consistent, in most cases by applying the names from the
documentation everywhere.

* src/module-env-27.h:
* src/module-env-25.h:
* src/emacs-module.h.in:
* src/emacs-module.c (module_get_environment)
(module_make_global_ref, module_free_global_ref)
(module_non_local_exit_get, module_non_local_exit_signal)
(module_make_function, module_funcall, module_type_of)
(module_is_not_nil, module_extract_integer)
(module_extract_float, module_copy_string_contents)
(module_make_string, module_vec_set, module_vec_get)
(module_vec_size, module_extract_time)
(module_assert_runtime):
* doc/lispref/internals.texi (Module Initialization)
(Module Functions, Module Values): Make argument names and some other
details consistent.  No functional changes.