Add Validation for Python Script Argument in gluepyspark Script

[adiaholic]

The gluepyspark script should validate whether any of the provided arguments are Python scripts (i.e., files with a .py extension). If a Python script is detected, the script should display the following message and exit:
Please use ./bin/gluesparksubmit <Python script path> to run scripts through Glue.

This change ensures that gluepyspark is used exclusively for launching interactive sessions.

Proposed Change: Add a loop to iterate through the provided arguments and check if any argument ends with .py. If such an argument is found, print a message and exit the script.

Impact: This change will prevent users from mistakenly using gluepyspark to run Python scripts, ensuring that the script is used only for its intended purpose of launching interactive sessions.