Patch release v5.8.1

This release is mainly to fix the Deepseek V4 integration!!!

• [fix] Add fatal_error to ContinuousBatchingManager so the serving... by @qgallouedec, @remi-or
• Fix WeightConverter regex incorrectly matching shared_experts as experts by @silencelamb, @claude
• Fix deepseek v4 by @ArthurZucker (#45892)
• Deepseek v4 csa mask collapse by @ArthurZucker, @Sawyer117 (#45928)