Fix excessive disk logging

[feng-j678]

[x] pr to address bug item 29588036: Prevent excessive logging to disk in runway OS-error conditions
[x] add truncation logic to handle runway logging to disk on machines when there's error, especially network issue. the truncation will cut the message at a safe point at newline and max log content size in byte is set at 32MB to prevent disk space exhaustion on machine
[x] add unit tests

[codecov]

Codecov Report

Attention: Patch coverage is 98.93617% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.42%. Comparing base (e989b35) to head (12c6895).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/core/tests/Test_FileLogger.py	98.87%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #287      +/-   ##
==========================================
+ Coverage   92.26%   92.42%   +0.16%     
==========================================
  Files          96       97       +1     
  Lines       16105    16199      +94     
==========================================
+ Hits        14859    14972     +113     
+ Misses       1246     1227      -19     

Flag	Coverage Δ
python27	92.42% <98.93%> (+0.16%)	⬆️
python39	92.42% <98.93%> (+0.16%)	⬆️

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