Increasing the Number of GPT-2-like Models Operable in the High-level IR Execution Framework

[ememos]

To validate the high-level IR execution framework, code for models other than gpt2, such as gpt2-medium, gpt2-large, and gpt2-xl, is also needed.

[ememos]

Added the following files:

• fx_dist_pp_training_type-C_gpt2-medium_gpu.py
• fx_dist_pp_training_type-C_gpt2-large_gpu.py
• fx_dist_pp_training_type-C_gpt2-xl_gpu.py

[ememos]

GPT like models are added in aicomp/opt_prime/examples