[WIP] Adding compliance checks regarding evaluation schedule.

[shangw-nvidia]

Work in progress. For issue #79 .

https://github.com/mlcommons/training_policies/blob/master/training_rules.adoc#94-quality-measure

No examples to test with: rnnt, unet3d Not sure if the current reference implementations match the training rules: bert, dlrm

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[xyhuang]

closing inactive PRs, please open a new PR if needed. thanks