[GraphBolt][CUDA] Other example cuda versions

[mfbalin]

Description

The examples left out from #6861.

Google colab demo here: https://colab.research.google.com/drive/1AMnK9YlEP5dSWiz1Kg6V6DdVjsiSeN75?usp=sharing

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: e16ab76c4a74e3ab3ef8b4b612d8c0dfb04ef695

Build ID: 1

Status: ❌ CI test failed in Stage [Torch CPU (Win64) Unit test].

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Commit ID: e720b8d96dee60beee7ffec531da88c32d0c7f14

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[mfbalin]

@frozenbugs what changes would be required if we wanted to enable GPU sampling in the rest of the examples here? I want to minimize the change to the examples to do this.

I feel that only the lightning example looks a bit too complicated. The line counts of the two other examples don't increase at all.

[dgl-bot]

Commit ID: 36e6c37

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[mfbalin]

@Rhett-Ying Are we going to release GPU accelerated R-GCN example? It already works and I think the release blog should mention it.

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Commit ID: b9b4aad

Build ID: 8

Status: ❌ CI test failed in Stage [Torch CPU Example test].

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Commit ID: 808349b

Build ID: 9

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Commit ID: 82ce371

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