common : fix Hermes/Qwen tool-call parsing to stop wrapper leaks #16378
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
Fixes #15012
(in the sense that XML no longer shows up in content, and qwen-code works with Qwen3-Coder-30B-A3B-Instruct-UD_Q4_K_XL)
<tool_call>/<function...>wrappers when the model nests a function block inside them<tool_call><function...>cases in the chat parser tests