This patch adds a pytype test to the mlgo-utils lit test suite to
prevent regressions in typing while we wait to setup precommit CI for
this specific project.
This is somewhat hacky, but is a temporary fix and will be pulled out
soonish. It also should only impact the ML buildbots as they are the
only ones that should have `pytype` installed.
This patch removes the absl dependency from the mlgo-utils scripts. We
were only using absl.logging, and absl.flags, so this patch just
consists of mechanically converting the absl flags parsing to Python's
builtin argparse as Python's logging is a drop in replacement for
absl.logging.
The library files in the new mlgo-utils utilities folder only depend on
absl.logging. The builtin Python logging library is a direct drop-in
replacement here, so we can just change the include and drop the test
dependency.
