Fixes #5298 🦕

Summary

This PR enhances the Experiment.get_data_frame method by adding date filtering capabilities. Users can now filter experiment runs by creation time using either string dates or Python's native datetime objects.

Changes

• Added create_time_start_date and create_time_end_date parameters to Experiment.get_data_frame and _ExperimentTracker.get_experiment_df method
• Enhanced _make_filter_string utility to support date filtering
• Added _convert_to_rfc3339 helper function to convert various date formats to RFC-3339 format required by the API
• Updated documentation and type hints

Benefits

• Enables users to easily filter experiment runs by creation date range
• Supports multiple input formats:
  • String dates ('YYYY-MM-DD')
  • RFC-3339 format strings
  • datetime.datetime objects
  • datetime.date objects
• Improves user experience by handling date format conversion automatically

Usage Example

import datetime

# Filter by string dates
df = experiment.get_data_frame(
    create_time_start_date="2023-01-01",
    create_time_end_date="2023-12-31"
)

# Filter using Python datetime objects
start_date = datetime.datetime(2023, 1, 1)
end_date = datetime.datetime(2023, 12, 31, 23, 59, 59)
df = experiment.get_data_frame(
    create_time_start_date=start_date,
    create_time_end_date=end_date
)