Add mem alloc handling

[brandonmontijo]

Processing output as chunks instead of bytes.

Trying to fix this error (amplify-devops) in some pipeline and codebuild applies that have large outputs:

Traceback (most recent call last):
--
File "/usr/local/bin/tf", line 329, in <module>
handler()
File "/usr/local/bin/tf", line 318, in handler
exec_tf_command(
File "/usr/local/bin/tf", line 121, in exec_tf_command
exit_code, stdout = execute_command(
File "/usr/local/lib/python3.10/dist-packages/terrawrap/utils/cli.py", line 111, in execute_command
exit_code, stdout = _execute_command(
File "/usr/local/lib/python3.10/dist-packages/terrawrap/utils/cli.py", line 194, in _execute_command
output = stdout_read.read(1).decode(errors="replace")
OSError: [Errno 12] Cannot allocate memory

[sonarqubecloud]

Quality Gate failed

Failed conditions
2 Security Hotspots

See analysis details on SonarQube Cloud