feat(scatter): add jitterRng / jitterSeed option to configure a custom random number generator or a random seed for deterministic jitter layout

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Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Introduce two new options for deterministic jitter layout; that is, the layout is fixed when data remains unchanged.

• jitterSeed - The seed for the random number generator. Defaults to 'echarts-jitter'. Internally, it uses a simple RNG based on the Mulberry32 algorithm.
• jitterRng - A fully custom random number generator for advanced usage.

Fixed issues

Resolves #21753

Details

Before: What was the problem?

The jitter layout always changes even if the data remains unchanged.

After: How does it behave after the fixing?

The jitter layout remains fixed when the data remains unchanged.

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

Security Checking

• This PR uses security-sensitive Web APIs.

ZRender Changes

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

Related test cases or examples to use the new APIs

TODO

Merging options

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

Other information

[echarts-bot]

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Document changes are required in this PR. Please also make a PR to apache/echarts-doc for document changes and update the issue id in the PR description. When the doc PR is merged, the maintainers will remove the PR: awaiting doc label.