fix(polar): fix edge symbols are clipped unexpectedly for the tiny offset.

[plainheart]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Fix the bug that symbols will be unexpectedly clipped in some scenarios.

Fixed issues

• echarts 绘制散点图时，在不同的移动设备上显示的散点图不全 #15292
• [Bug] 散点图在极坐标中展示不全 #16328

Details

Comparison

Before	After

Misc

• The API has been changed (apache/echarts-doc#xxx).
• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

Please refer to the second test case in test/clip.html.

• https://www.makeapie.com/editor.html?c=xNWkC5gbUM&v=1 ([Bug] 散点图在极坐标中展示不全 #16328)
• https://jsfiddle.net/tks007/hsufw179/11/ (echarts 绘制散点图时，在不同的移动设备上显示的散点图不全 #15292)

Others

Merging options

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

Other information

[echarts-bot]

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[echarts-bot]

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