Move find_path_from_directory to shared module_loading library

[amoghrajesh]

This is a precursor to: #59956 to remove usages of airflow references in shared libraries.

There are some utilities like this one: find_path_from_directory which is needed in dag path discovery as well in plugins manager. Right now its present in utils.file.

Since it is a module_loading related utility, moving it to module_loading shared library made the most sense. This allows shared libraries like plugins_manager to use the
function without importing from airflow.*

Changes of note:

• New file shared/module_loading/file_discovery.py
• Update airflow.utils.file to import from shared and inline config
• Update plugins_manager to import from shared library

The method in shared library defaults to "glob" syntax. Any callers that needed a change have been updated to instead inject the dependency config after reading it from conf

Deprecation works:

from airflow.utils.file import find_path_from_directory
<ipython-input-2-a3047d0a2d8f>:1 DeprecatedImportWarning: Importing find_path_from_directory from airflow.utils.file is deprecated and will be removed in a future version. Use airflow._shared.module_loading.find_path_from_directory instead.

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[amoghrajesh]

Pretty trivial, merging it