fix(graph): draggable only work on force layout

[kongmoumou]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

PR #15428 enable draggable for all layout(could test in test/graph-draggable.html), but #16867 maybe override the flag unintentionally resulting that draggable only work on layout: force.

This pr fix it.

Fixed issues

Details

Before: What was the problem?

After: How does it behave after the fixing?

Document Info

One of the following should be checked.

• This PR doesn't relate to document changes
• The document should be updated later
• The document changes have been made in apache/echarts-doc#xxx

Misc

ZRender Changes

• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

N.A.

Others

Merging options

• Please squash the commits into a single one when merging.

Other information

[echarts-bot]

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⚠️ MISSING DOCUMENT INFO: Please make sure one of the document options are checked in this PR's description. Search "Document Info" in the description of this PR. This should be done either by the author or the reviewers of the PR.

[Ovilia]

@kongmoumou Could you please explain what situation this PR fixes? You may need to add them in the test files.

[kongmoumou]

@Ovilia added the following explaination

PR #15428 enable draggable for all layout(could test in test/graph-draggable.html), but #16867 maybe override the flag unintentionally resulting that draggable only work on layout: force.

[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍