[GraphBolt] Rename `ItemSetDict` as `HeteroItemSet`

Skeleton003 commented 1 month ago

Description

Though ItemSetDict is named with dict and takes a dictionary as input, it does not behave as a dictionary, but like a Sequence instead. So maybe we should rename it to avoid confusion. Relative issues: #6672 #6785

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 commented 1 month ago

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 commented 1 month ago

Commit ID: 2b3d7b7c1af9380f498801c6366d3bd89144acc2

Build ID: 1

Status: ✅ CI test succeeded.

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dmlc / dgl