Print peak memory usage for stats reporter

[ruchika2ar]

Issue number of the reported bug or feature request: #620

Describe your changes Print peak memory usage on the terminal for stats reporter

Testing performed Tested locally by running the stats reporter on exercise_2

[codecov-commenter]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 92.88%. Comparing base (e1508bb) to head (c51900e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #771      +/-   ##
==========================================
- Coverage   92.94%   92.88%   -0.06%     
==========================================
  Files          95       95              
  Lines       11686    11689       +3     
  Branches      407      407              
==========================================
- Hits        10861    10857       -4     
- Misses        825      832       +7     

Flag	Coverage Δ
cpp	92.88% <100.00%> (-0.06%)	:arrow_down:
python_and_cython	92.88% <100.00%> (-0.06%)	:arrow_down:

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