fix(logging): downgrade csv export log to debug

[nytai]

SUMMARY

This should be on debug level as it logs the entire export request which may contain sensitive info in the query.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A

TESTING INSTRUCTIONS

• Export a CSV, this line shouldn't log.
• Set log level to DEBUG, export CSV, this line should log.

ADDITIONAL INFORMATION

• Has associated issue:
• 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 #15123 (0266790) into master (5e543e3) will increase coverage by 0.43%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #15123      +/-   ##
==========================================
+ Coverage   77.09%   77.52%   +0.43%     
==========================================
  Files         971      967       -4     
  Lines       50236    49838     -398     
  Branches     6494     6358     -136     
==========================================
- Hits        38729    38639      -90     
+ Misses      11302    10997     -305     
+ Partials      205      202       -3     

Flag	Coverage Δ
hive	81.42% <100.00%> (ø)
mysql	81.70% <100.00%> (ø)
postgres	81.71% <100.00%> (ø)
python	82.09% <100.00%> (ø)
sqlite	81.34% <100.00%> (ø)

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

Impacted Files	Coverage Δ
superset/views/core.py	75.46% <100.00%> (ø)
.../src/dashboard/components/gridComponents/Chart.jsx	81.18% <0.00%> (-3.86%)	⬇️
...rontend/src/SqlLab/components/SqlEditorLeftBar.jsx	53.22% <0.00%> (-2.84%)	⬇️
...veFilters/FilterBar/FilterControls/FilterValue.tsx	67.44% <0.00%> (-1.38%)	⬇️
...tiveFilters/FilterBar/FilterSets/FiltersHeader.tsx	91.66% <0.00%> (-1.36%)	⬇️
...c/filters/components/Select/SelectFilterPlugin.tsx	79.04% <0.00%> (-1.14%)	⬇️
...t-frontend/src/dashboard/reducers/nativeFilters.ts	58.97% <0.00%> (-1.03%)	⬇️
...omponents/nativeFilters/FilterBar/Header/index.tsx	90.90% <0.00%> (-0.99%)	⬇️
...frontend/src/views/CRUD/welcome/DashboardTable.tsx	65.78% <0.00%> (-0.47%)	⬇️
...erset-frontend/src/SqlLab/components/SqlEditor.jsx	54.62% <0.00%> (-0.42%)	⬇️
... and 53 more

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