[AGENT-6608][AGENT-6612][AGENT-6613] Add use_datarobot_predict and time series args to server and score command parsers.

[kijimoshib]

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Rationale

The changes ensure that time series parameters:

• Only work with the score command
• Require --use-datarobot-predict flag
• Support proper ISO-8601 timestamp validation
• Have proper mutually exclusive options validation
• Are properly passed through the entire pipeline

Summary

Here's a summary of the main changes to implement time series parameters:

1. args_parser.py:

   • Added time series validation to only allow in score command
   • Modified _reg_arg_time_series to check command type
   • Updated register_args to only attach time series args to score_parser
   • Added command validation in verify_options

2. drum_score_adapter.py:

   • Added new time series parameters:
     • forecast_point
     • predictions_start_date
     • predictions_end_date
   • Added documentation for new parameters
   • Added instance variables for time series parameters

3. predict_mixin.py:

   • Added request.args as param to predict