Squashed 'external/workload-automation/' changes from c4c02309..31d306c2

31d306c2 docs: Fix typo in variable name
591c85ed Remove pkg-resources
72298ff9 speedometer: address pylint complaints
f0877088 speedometer: fix @once methods which declare attributes
a5e5920a speedometer: ensure adb reverse works across reboots
5558d43d version: Bump required devlib version
c8ea525a fw/target/info: Utilise target properties

git-subtree-dir: external/workload-automation
git-subtree-split: 31d306c23a75eff06e51e03154d0dabd8a553647