Don't include dependent roles in the dep chain for include_role

The dependency chain should not include roles below the parent, as it
can introduce very weird things like conditionals from child deps impacting
non-related roles.

Fixes ansible#25136

lib/ansible/playbook/helpers.py

@@ -294,6 +294,7 @@ def load_list_of_tasks(ds, play, block=None, role=None, task_include=None, use_h
                 #   2. one of the appropriate config options was set
                 if 'import_role' in task_ds:
                     is_static = True
+
                 if ir.static is not None:
                     display.deprecated("The use of 'static' for 'include_role' has been deprecated. "
                                        "Use 'import_role' for static inclusion, or 'include_role' for dynamic inclusion")
@@ -315,6 +316,7 @@ def load_list_of_tasks(ds, play, block=None, role=None, task_include=None, use_h
                         (not needs_templating and ir.all_parents_static() and not ir.loop)
                     )
                     display.debug('Determined that if include_role static is %s' % str(is_static))
+
                 if is_static:
                     # uses compiled list from object
                     t = task_list.extend(ir.get_block_list(variable_manager=variable_manager, loader=loader))

lib/ansible/playbook/role_include.py

@@ -80,7 +80,6 @@ def get_block_list(self, play=None, variable_manager=None, loader=None):
             dep_chain = []
         else:
             dep_chain = list(self._parent_role._parents)
-            dep_chain.extend(self._parent_role.get_all_dependencies())
             dep_chain.append(self._parent_role)
 
         blocks = actual_role.compile(play=myplay, dep_chain=dep_chain)
@@ -115,7 +114,7 @@ def load(data, block=None, role=None, task_include=None, variable_manager=None,
             if option in ir.args:
                 setattr(ir, option, ir.args.get(option))
 
-        return ir.load_data(data, variable_manager=variable_manager, loader=loader)
+        return ir
 
     def copy(self, exclude_parent=False, exclude_tasks=False):