[Bug] Missing resolve in ImportlibResourcesConfigSource

[Eldalie]

🐛 Bug

Description

in function is_config of hydra/_internal/core_plugins/importlib_resources_config_source.py.
at line 86 res = files.joinpath(config_path) : resolve is missing and thus ret = res.exists() and res.is_file() can be wrongly false as the file can exist.

Checklist

• I checked on the latest version of Hydra

Expected Behavior

The same behavior as hydra/_internal/core_plugins/file_config_source.py where the path is corrected with realpath.

System information

• Hydra Version : 1.3.2
• Python version : 3.12
• Virtual environment type and version : poetry 1.8.3
• Operating system : Linux