New features

• Support training GPTQ quantized model #729 #1481 #1545
• Support resuming reward model training #1567

Bug fix

• Change default PPO parameters by @hannlp in #1553
• Fix ChatGLM2&3 templates #1453 #1480
• Fix #1548 by @Outsider565 in #1544
• Fix #1263 #1550 #1558