fix(annotation): Address regression from #24694

[john-bodley]

SUMMARY

This PR fixes a regression introduced in #24694. Specifically previously the legacy TableViz returned both the records and the columns associated with the records, however per here the new formulation only returned the records resulting in the annotation layer being deemed invalid by the frontend.

Rather than also explicitly including the column names (which is also redundant as the names are included in the records) this PR simply removes them as they're superfluous and not used by the frontend anywhere.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

CI and ran an end-to-end test locally.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[john-bodley]

LOL. The columns here should be the same columns as the records which is the output of the conversion of a Pandas DataFrame to a dictionary, i.e., this should have read,

columns: ['a', 'b']

[codecov]

Codecov Report

Merging #24874 (252051b) into master (44e4fb1) will decrease coverage by 0.01%.
Report is 5 commits behind head on master.
The diff coverage is 60.91%.

❗ Current head 252051b differs from pull request most recent head 8e0ed3b. Consider uploading reports for the commit 8e0ed3b to get more accurate results

@@            Coverage Diff             @@
##           master   #24874      +/-   ##
==========================================
- Coverage   69.00%   69.00%   -0.01%     
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  Files        1904     1906       +2     
  Lines       74107    74141      +34     
  Branches     8194     8208      +14     
==========================================
+ Hits        51140    51161      +21     
- Misses      20848    20859      +11     
- Partials     2119     2121       +2     

Flag	Coverage Δ
javascript	55.84% <60.91%> (+<0.01%)	⬆️

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

Files Changed	Coverage Δ
...d/packages/superset-ui-chart-controls/src/types.ts	100.00% <ø> (ø)
...s/legacy-plugin-chart-heatmap/src/controlPanel.tsx	57.14% <ø> (ø)
.../legacy-plugin-chart-heatmap/src/transformProps.js	0.00% <ø> (ø)
.../legacy-plugin-chart-world-map/src/controlPanel.ts	25.00% <ø> (ø)
...egacy-plugin-chart-world-map/src/transformProps.js	0.00% <ø> (ø)
...harts/src/BigNumber/BigNumberTotal/controlPanel.ts	30.00% <ø> (ø)
...rts/src/BigNumber/BigNumberTotal/transformProps.ts	0.00% <ø> (ø)
.../BigNumber/BigNumberWithTrendline/controlPanel.tsx	16.66% <ø> (ø)
...BigNumber/BigNumberWithTrendline/transformProps.ts	48.57% <ø> (ø)
...s/plugin-chart-echarts/src/Funnel/controlPanel.tsx	66.66% <ø> (ø)
... and 49 more

... and 1 file with indirect coverage changes

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[michael-s-molina]

LGTM