refactor/docs: improve compile_pip_requirements error message and docs (#2792) Resolution failure is the most common error from pip-compile, so we should make sure the error message is as clean as it can be. Previously, the output was cluttered with the exception traceback, which makes the actual error hard to see (several nested traceback). The new output shortens it with a nicer message: ``` Checking _main/requirements_lock.txt ERROR: Cannot install requests<2.24 and requests~=2.25.1 because these package versions have conflicting dependencies. ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts ``` Fixes #2763 --------- Co-authored-by: Richard Levasseur <rlevasseur@google.com>
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