fix: change dataset functionality in Explore

[hughhhh]

SUMMARY

Update function reference for explore to change Datasets

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

[pkdotson]

lgtm!

[codecov]

Codecov Report

Merging #20751 (b610014) into master (92f3621) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master   #20751      +/-   ##
==========================================
- Coverage   66.26%   66.26%   -0.01%     
==========================================
  Files        1754     1754              
  Lines       66673    66678       +5     
  Branches     7049     7049              
==========================================
+ Hits        44180    44181       +1     
- Misses      20696    20700       +4     
  Partials     1797     1797              

Flag	Coverage Δ
javascript	51.92% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...re/components/controls/DatasourceControl/index.jsx	75.24% <0.00%> (ø)
...set-frontend/src/explore/actions/exploreActions.ts	47.72% <0.00%> (-2.28%)	⬇️
...et-frontend/src/explore/reducers/exploreReducer.js	39.34% <0.00%> (-0.66%)	⬇️

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