API for initiating training should accept Metadata to override default configurations in specific instances

[sooraj1002]

Dictionary for arguments -> this will go to the trainer class

[Gautam-Rajeev]

metadata will be like this - https://huggingface.co/docs/transformers/v4.41.3/en/main_classes/trainer#transformers.TrainingArguments

essentially this will overwrite any other arguments set by default for these keys while training. The HF trainer will take in any dictionary.. @TakshPanchal will provide a list of possible keys (picked from the above) . if the user has provided any other key, we'll throw an errror saying this is not a part of Trainer class.