Cherry pick `Warning for missing FP8 checkpoint support for vLLM deployment (10906)` into `r2.0.0`
cc @oyilmaz-nvidia 
[🤖]: Hi @janekl 👋,<br><br>we've cherry picked #10906 into `r2.0.0` for you! 🚀<br><br>Please review and approve this cherry pick by your convenience\!