Previously we simply ignored skipped tests when performing test chunking in the
taskgraph. This could sometimes result in a task that runs a single manifest
that happens to be skipped on that task's configuration. This results in an error
that no tests were run from the harness.
This patch attempts to guess a mozinfo based on a task's definition. Then it
uses those values to take skipped tests into account when running the chunking
algorithm. That way the chances of scheduling a manifest that would be skipped
anyway are much lower.
Depends on D58987
Differential Revision: https://phabricator.services.mozilla.com/D58988
--HG--
extra : moz-landing-system : lando
ee1497a26e