Add self extend support to server

[Josh-XT]

Add self extend support to server

• Adds the --grp-attn-n and --grp-attn-w params to the server that were added in main : add Self-Extend support #4815

[duykhanhbk]

Thanks for your work @Josh-XT
I also created a similar issue #4886

Have you tested it yet, does it work like main, I'll test with that?

[Josh-XT]

Thanks for your work @Josh-XT I also created a similar issue #4886

Have you tested it yet, does it work like main, I'll test with that?

Sorry I missed something! I'll set to ready here shortly.