feat: implement Metrics dnd

[kgabryje]

🏆 Enhancements

If ENABLE_EXPLORE_DRAG_AND_DROP is set, enables drag and drop feature for metrics control.

CC @villebro @junlincc

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[codecov]

Codecov Report

Merging #1004 (739c86e) into master (a8eab72) will decrease coverage by 0.00%.
The diff coverage is 20.00%.

@@            Coverage Diff             @@
##           master    #1004      +/-   ##
==========================================
- Coverage   27.90%   27.89%   -0.01%     
==========================================
  Files         414      414              
  Lines        8512     8522      +10     
  Branches     1205     1210       +5     
==========================================
+ Hits         2375     2377       +2     
- Misses       5983     5989       +6     
- Partials      154      156       +2     

Impacted Files	Coverage Δ
...et-ui-chart-controls/src/shared-controls/index.tsx	41.05% <0.00%> (-0.89%)	⬇️
...chart-controls/src/shared-controls/dndControls.tsx	29.16% <25.00%> (-2.09%)	⬇️

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[zhaoyongjie]

LGTM