fix collection adjacent loading with --playbook-dir (#56194)

* added inventory adjacent test

lib/ansible/cli/__init__.py

@@ -15,20 +15,21 @@ import sys
 
 from abc import ABCMeta, abstractmethod
 
+from ansible.cli.arguments import option_helpers as opt_help
 from ansible import constants as C
 from ansible import context
-from ansible.cli.arguments import option_helpers as opt_help
 from ansible.errors import AnsibleError
 from ansible.inventory.manager import InventoryManager
 from ansible.module_utils.six import with_metaclass, string_types
 from ansible.module_utils._text import to_bytes, to_text
 from ansible.parsing.dataloader import DataLoader
+from ansible.parsing.vault import PromptVaultSecret, get_file_vault_secret
+from ansible.plugins.loader import add_all_plugin_dirs
 from ansible.release import __version__
+from ansible.utils.collection_loader import set_collection_playbook_paths
 from ansible.utils.display import Display
 from ansible.utils.path import unfrackpath
 from ansible.vars.manager import VariableManager
-from ansible.parsing.vault import PromptVaultSecret, get_file_vault_secret
-from ansible.plugins.loader import add_all_plugin_dirs
 
 try:
     import argcomplete
@@ -433,6 +434,7 @@ class CLI(with_metaclass(ABCMeta, object)):
         if basedir:
             loader.set_basedir(basedir)
             add_all_plugin_dirs(basedir)
+            set_collection_playbook_paths(basedir)
 
         vault_ids = list(options['vault_ids'])
         default_vault_ids = C.DEFAULT_VAULT_IDENTITY_LIST