[workflow] adjust the GPU memory threshold for scheduled unit test

[FrankLeeeee]

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Fixed #2557

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This PR did two things:

1. rename the workflow files for consistency with [workflow] fixed example check workflow #2554
2. adjusted the used GPU memory from 100MB to 10GB such that the workflow can run on our machine as long as no one is using more than 10 GB memory out of 80 GB. We need to set this threshold because sometimes the machine will have various DL jobs running so as not to interrupt those jobs.

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