Add hook for Hydra config system (hydra-core)

[rokm]

Closes #424.

[matinmoezzi]

Hi,
python 3.8.19
hydra-core version = 1.3.2
pyinstaller version = 6.9.0
It seems that hydra-plugins issue is not still solved.

Traceback (most recent call last):
  File "main.py", line 97, in <module>
    app()
  File "hydra/main.py", line 94, in decorated_main
  File "hydra/_internal/utils.py", line 337, in _run_hydra
  File "hydra/_internal/utils.py", line 190, in create_automatic_config_search_path
  File "hydra/_internal/utils.py", line 203, in create_config_search_path
  File "hydra/core/plugins.py", line 46, in instance
  File "hydra/core/singleton.py", line 17, in instance
  File "hydra/core/singleton.py", line 13, in __call__
  File "hydra/core/plugins.py", line 54, in __init__
  File "hydra/core/plugins.py", line 71, in _initialize
  File "hydra/core/plugins.py", line 186, in _scan_all_plugins
AttributeError: 'PyiFrozenImporter' object has no attribute 'find_module'
[45564] Failed to execute script 'main' due to unhandled exception!

However, it's working with --noarchive flag. With no archive, hydra directory contains all plugins in .pyc.

[rokm]

It seems that hydra-plugins issue is not still solved.

See facebookresearch/hydra#2531. We have no plans of reverting pyinstaller/pyinstaller#7344.

[rokm]

Although on the other hand, we can also work around this on our side by collecting those plugins as source .py files only, if we detect python < 3.10 and PyInstaller >= 5.8: #760.

[matinmoezzi]

@rokm Thank you so much. I upgraded python=3.8 to 3.10 and it solved the issue.