fix(plugin-chart-echarts): funnel chart improvements

[xiezhongfu]

🏆 Enhancements

1: add onInit function to make row_limit default value into effect

1.1: before

1.2: after

2: rm LABEL LINE

2.1: before

2.2: after

3: rm label's textBorderColor

3.1: before

3.2: after

4: rm Funnel shape

4.1: rm Funnel shape before

4.1: rm Funnel shape after

5: rm legend type

5.1: before

5.2: after

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/superset/superset-ui/4sTYANjJYc4dWMEuwpmsRf3xSZAk
✅ Preview: https://superset-ui-git-fork-xiezhongfu-master-superset.vercel.app

[codecov]

Codecov Report

Merging #1110 (a5b362c) into master (9e89c9e) will increase coverage by 0.01%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master    #1110      +/-   ##
==========================================
+ Coverage   28.98%   28.99%   +0.01%     
==========================================
  Files         462      462              
  Lines        9202     9204       +2     
  Branches     1449     1449              
==========================================
+ Hits         2667     2669       +2     
  Misses       6333     6333              
  Partials      202      202              

Impacted Files	Coverage Δ
.../plugin-chart-echarts/src/Funnel/transformProps.ts	74.35% <ø> (ø)
...s/plugin-chart-echarts/src/Funnel/controlPanel.tsx	66.66% <75.00%> (+16.66%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9e89c9e...a5b362c. Read the comment docs.

[zhaoyongjie]

LGTM