fix(explore): datatable crash when dimension is empty

[Usiel]

Fixes #20679

SUMMARY

react-table wants every column to have a non-empty ID (or Header), else it will crash. So we simply use the current index as a fallback. From what I can see this has no side effects.

Previously fixed with #17303
Reintroduced with #18569

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Before: https://d.pr/i/KQMrPe
After: https://d.pr/i/2qWjaq

TESTING INSTRUCTIONS

See #20679.

ADDITIONAL INFORMATION

• Has associated issue: Explore Datatable crash when dimension is empty #20679

[github-actions]

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[stephenLYZ]

Thanks for your contribution! cc @zhaoyongjie @kgabryje

[kgabryje]

Thanks for the fix! Could you please write a more descriptive comment for this?

[Usiel]

Thanks for the fix! Could you please write a more descriptive comment for this?

Oops, of course! Must have fallen asleep before finishing my change 😄

[codecov]

Codecov Report

Merging #20680 (78b6fd8) into master (8d4994a) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

❗ Current head 78b6fd8 differs from pull request most recent head 459b313. Consider uploading reports for the commit 459b313 to get more accurate results

@@            Coverage Diff             @@
##           master   #20680      +/-   ##
==========================================
- Coverage   66.85%   66.85%   -0.01%     
==========================================
  Files        1753     1753              
  Lines       65825    65826       +1     
  Branches     7006     7007       +1     
==========================================
  Hits        44010    44010              
  Misses      20030    20030              
- Partials     1785     1786       +1     

Flag	Coverage Δ
javascript	51.95% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../src/explore/components/DataTableControl/index.tsx	64.04% <0.00%> (-0.73%)	⬇️

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