[contracts] Add integrity checks by pallet hook (#12993)

* integrity test for MaxCodeLen and CallStack::len()

* integrity test for MaxDebugBufferLen

* addressed review comments

* fix append_debug_buffer()

* ci fix

* updated code_len_limit formula after further discussion

* enlarged mem safe margin after discussion

* +doc to Config trait associated types

* Apply suggestions from code review

Co-authored-by: Alexander Theißen <[email protected]>

* more lil fixes from code review feedback

* lowered max call depth to satisfy mem limits

* fix node runtime pallet params to satisfy integrity check

* fix max call depth value calc

Co-authored-by: Alexander Theißen <[email protected]>