fix(markLine): fix axis type in markLine data and close #14300

[Ovilia]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

string is a valid type for markLine.data because time axis values can be string. This PR adds string to its type.

Fixed issues

• MarkLine1DDataItemOption incorrectly defines xAxis as number #14300: MarkLine1DDataItemOption incorrectly defines xAxis as number

Details

Before: What was the problem?

Only number is supported for MarkLine1DDataItemOption.xAxis.

After: How is it fixed in this PR?

Set the type to be number | string.

Usage

Are there any API changes?

• The API has been changed.

Related test cases or examples to use the new APIs

NA.

Others

Merging options

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

Other information

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[echarts-bot]

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