feat: add Query.columns for bootstrap_data

[hughhhh]

SUMMARY

Added logic to send Query.columns to explore if the datasource is a Query.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

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

[codecov]

Codecov Report

Merging #20134 (8cefeb6) into master (660af40) will decrease coverage by 11.91%.
The diff coverage is 28.57%.

❗ Current head 8cefeb6 differs from pull request most recent head 433d4d7. Consider uploading reports for the commit 433d4d7 to get more accurate results

@@             Coverage Diff             @@
##           master   #20134       +/-   ##
===========================================
- Coverage   66.47%   54.55%   -11.92%     
===========================================
  Files        1721     1721               
  Lines       64477    64500       +23     
  Branches     6795     6805       +10     
===========================================
- Hits        42858    35187     -7671     
- Misses      19891    27581     +7690     
- Partials     1728     1732        +4     

Flag	Coverage Δ
hive	53.70% <0.00%> (-0.01%)	⬇️
mysql	?
postgres	?
presto	53.56% <0.00%> (-0.01%)	⬇️
python	57.99% <40.00%> (-24.64%)	⬇️
sqlite	?
unit	49.40% <40.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...egacy-plugin-chart-event-flow/src/controlPanel.tsx	14.28% <0.00%> (ø)
...chart-echarts/src/MixedTimeseries/controlPanel.tsx	86.66% <0.00%> (-6.20%)	⬇️
.../plugin-chart-echarts/src/MixedTimeseries/index.ts	25.00% <0.00%> (-25.00%)	⬇️
...hart-echarts/src/MixedTimeseries/transformProps.ts	0.00% <0.00%> (ø)
.../plugin-chart-echarts/src/Timeseries/buildQuery.ts	66.66% <ø> (-4.77%)	⬇️
...tend/plugins/plugin-chart-echarts/src/controls.tsx	56.66% <0.00%> (-17.25%)	⬇️
...nd/src/explore/controlUtils/getSectionsToRender.ts	80.00% <ø> (-0.96%)	⬇️
superset/views/core.py	35.06% <0.00%> (-42.33%)	⬇️
...d/plugins/plugin-chart-echarts/src/utils/series.ts	87.50% <20.00%> (-4.50%)	⬇️
...t-frontend/src/dashboard/components/SliceAdder.jsx	66.17% <33.33%> (-3.18%)	⬇️
... and 286 more

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[pkdotson]

lgtm!

[eschutho]

The current columns are passed in to the datasource object. For easier lookup, do you think we can keep the same structure for queries, instead of having to look in two different places?