[Intel XPU]support xgrammar backend for intel xpu#13245

hnyls2002 merged 2 commits intosgl-project:mainsgl-project/sglang:mainfrom

gaopengff:gaopengf/fix_ut_failures_for_xpugaopengff/sglang:gaopengf/fix_ut_failures_for_xpuCopy head branch name to clipboard