[GraphBolt] Implement dependent minibatching for labor.

[mfbalin]

Description

The continuous seed file is mostly a copy of https://github.com/dmlc/dgl/blob/master/src/random/continuous_seed.h.

These changes are needed to implement the layer_dependency and batch_dependency arguments in https://docs.dgl.ai/en/latest/generated/dgl.dataloading.LaborSampler.html#dgl.dataloading.LaborSampler. They will be enabled in a future PR.

Checklist

Please feel free to remove inapplicable items for your PR.

• The PR title starts with [$CATEGORY] (such as [NN], [Model], [Doc], [Feature]])
• I've leverage the tools to beautify the python and c++ code.
• The PR is complete and small, read the Google eng practice (CL equals to PR) to understand more about small PR. In DGL, we consider PRs with less than 200 lines of core code change are small (example, test and documentation could be exempted).
• All changes have test coverage
• Code is well-documented
• To the best of my knowledge, examples are either not affected by this change, or have been fixed to be compatible with this change
• Related issue is referred in this PR
• If the PR is for a new model/paper, I've updated the example index here.

Changes

[dgl-bot]

To trigger regression tests:

• @dgl-bot run [instance-type] [which tests] [compare-with-branch];
  For example: @dgl-bot run g4dn.4xlarge all dmlc/master or @dgl-bot run c5.9xlarge kernel,api dmlc/master

[dgl-bot]

Commit ID: 869a980

Build ID: 1

Status: ✅ CI test succeeded.

Report path: link

Full logs path: link

[mfbalin]

@dgl-bot run g4dn.8xlarge model,api dmlc/master

[dgl-bot]

Commit ID: 869a980

Build ID: 2

Status: ❌ CI test failed in Stage [Regression Test].

Report path: link

Full logs path: link

[451578928]

  您好，信已收到，尽快给您回复。

[mfbalin]

@frozenbugs How do I run the regression tests to ensure this PR is not slowing down the CPU layer_neighbor implementation?

[dgl-bot]

Commit ID: 8b1a19d

Build ID: 3

Status: ✅ CI test succeeded.

Report path: link

Full logs path: link

[frozenbugs]

@frozenbugs How do I run the regression tests to ensure this PR is not slowing down the CPU layer_neighbor implementation?

Just merge the code, and the result will be send out tomorrow to you. If any unexpected happens, we can revert this PR.