feat: support pathlib.Path as argument of TortoiseConfig.from_config_file

[waketzheng]

Description

To support Path as argument of TortoiseConfig.from_config_file/resolve_args, for example:

from pathlib import Path

filepath = Path('/path/to/config.json')
config = TortoiseConfig.from_config_file(filepath)
config2 = TortoiseConfig.resolve_args(config_file=filepath)

assert config == config2 == TortoiseConfig.from_config_file(str(filepath))

[codspeed-hq]

Merging this PR will not alter performance

✅ 24 untouched benchmarks

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_{Comparing waketzheng:feat/support-Path-as-config-file (60755b6) with develop (9d0e53e)}