fix: Add extra requires for shillelagh

[etr2460]

SUMMARY

I'm not a python expert, but while trying to enable the gsheets API, I got the error No module named 'google.auth'. It looks like we need to add the extra require from shillelagh like this, but i'm not positive that this is the right syntax. I'm hoping CI will help me out, but i'll also test this locally to see if it fixes the issue

Also updates some documentation

TEST PLAN

CI, dev

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

to: @betodealmeida

[codecov]

Codecov Report

Merging #14180 (f24e1d4) into master (df7e2b6) will decrease coverage by 0.00%.
The diff coverage is 80.00%.

❗ Current head f24e1d4 differs from pull request most recent head 1b082ef. Consider uploading reports for the commit 1b082ef to get more accurate results

@@            Coverage Diff             @@
##           master   #14180      +/-   ##
==========================================
- Coverage   79.80%   79.79%   -0.01%     
==========================================
  Files         943      944       +1     
  Lines       47874    47916      +42     
  Branches     6042     6067      +25     
==========================================
+ Hits        38204    38233      +29     
- Misses       9548     9559      +11     
- Partials      122      124       +2     

Flag	Coverage Δ
hive	80.37% <0.00%> (-0.01%)	⬇️
mysql	80.64% <0.00%> (-0.01%)	⬇️
postgres	80.67% <0.00%> (-0.01%)	⬇️
python	81.07% <0.00%> (-0.01%)	⬇️
sqlite	80.27% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...end/src/SqlLab/components/RunQueryActionButton.tsx	64.28% <ø> (ø)
...-frontend/src/components/CronPicker/CronPicker.tsx	91.66% <ø> (ø)
...perset-frontend/src/components/CronPicker/index.ts	100.00% <ø> (ø)
...t-frontend/src/components/DropdownButton/index.tsx	24.00% <ø> (ø)
superset-frontend/src/components/Switch/index.tsx	100.00% <ø> (ø)
...set-frontend/src/views/CRUD/welcome/ChartTable.tsx	77.08% <ø> (ø)
...frontend/src/views/CRUD/welcome/DashboardTable.tsx	63.63% <ø> (ø)
...-frontend/src/visualizations/presets/MainPreset.js	100.00% <ø> (ø)
superset/viz.py	55.59% <0.00%> (-0.07%)	⬇️
...perset-frontend/src/views/CRUD/chart/ChartList.tsx	84.32% <80.00%> (-0.17%)	⬇️
... and 11 more

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[villebro]

LGTM but I'd prefer for @betodealmeida to confirm!

[etr2460]

I verified that installing now includes google.auth and querying from sql lab works

[betodealmeida]

Good catch, sorry for missing that!