Faster train/test task generation

[ecsalomon]

Generating train/test tasks can take hours. One culprit may be slow IO
of the matrices, which are loaded to decide if the job should be
processed. This commit makes the train-tester generate all of the tasks
withoug checking the matrices and skips processing the tasks if the
matrices are no good.

[codecov-io]

Codecov Report

Merging #628 into master will not change coverage.
The diff coverage is 33.33%.

@@           Coverage Diff           @@
##           master     #628   +/-   ##
=======================================
  Coverage   70.28%   70.28%           
=======================================
  Files          87       87           
  Lines        5775     5775           
=======================================
  Hits         4059     4059           
  Misses       1716     1716

Impacted Files	Coverage Δ
src/triage/component/catwalk/__init__.py	90.62% <33.33%> (ø)	⬆️

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[thcrock]

Looks good to me!