Warn only mode for max http request bytes and parser tokens

[smyrick]

Is your feature request related to a problem? Please describe.**

Router has a feature today to limit the incoming operation with various options like so

limits:
  http_max_request_bytes: 2000000
  parser_max_tokens: 15000
  parser_max_recursion: 500
  max_height: 20
  max_depth: 5
  warn_only: true

If I set the warn_only mode, then any operations that are to big still are supposed to pass but just log. This is true for options like max_height and max_depth but it is not true for

• http_max_request_bytes
• parser_max_tokens
• parser_max_recursion

All of these options hard fail a request even if I have set warn_only: true

Describe the solution you'd like

I see two possible solutions, if these are not configurable internally to be warning options then we should maybe move them out to a different config group that does not have a warn mode, (maybe https://github.com/apollographql/router/issues/5277)

server:
  http_max_request_bytes: 2000000
  parser_max_tokens: 15000
  parser_max_recursion: 500

limits:
  max_height: 20
  max_depth: 5
  warn_only: true

OR

if it is possible to make this warn and not hard error we could set a warn_max and a true_max or if even possible when warn mode is on, dynamically grow the max and just log that we have done so.

Describe alternatives you've considered

I could implement this elsewhere as a coprocessor or API gateway plugin if I wanted to set lower limits and find the proper values. I could also set higher limits in Router to make sure they are never hit, but it would be much easier to know what those values were if I was logging anytime those values went above my current configured threashold