5385 Add support to override experiment tracking configs

[Nic-Ma]

Part of #5385 .

Description

This PR added support to override the predefined configs in the experiment tracking settings.

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[Nic-Ma]

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[Nic-Ma]

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[Nic-Ma]

Hi @wyli , @binliunls ,

Usage examples:

1. run bundle training without experiment management:
   python -m monai.bundle run training --meta_file configs/metadata.json --config_file configs/train.json

2. run bundle training with MLFlow default settings:
   python -m monai.bundle run training --meta_file configs/metadata.json --config_file configs/train.json --tracking mlflow

3. run bundle training with MLFlow default settings and override "tracking_uri" at runtime:
   python -m monai.bundle run training --meta_file configs/metadata.json --config_file configs/train.json --tracking mlflow --tracking_uri "<my path>"

4. run bundle training with tracking settings from a JSON file:
   python -m monai.bundle run training --meta_file configs/metadata.json --config_file configs/train.json --logging_file configs/logging.conf --tracking configs/mlflow_settings.json

5. run bundle training with tracking settings from a JSON file and override "tracking_uri" at runtime:
   python -m monai.bundle run training --meta_file configs/metadata.json --config_file configs/train.json --tracking configs/mlflow_settings.json --tracking_uri "<my path>"

We will make a tutorial to describe more example details soon.

Thanks.

[Nic-Ma]

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[Nic-Ma]

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[wyli]

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