fix(schedule-query): getUISchema function called in SchemaForm component

[RahulRaj97]

SUMMARY

Fixed getUISchema function call in ScheduleQueryButton Component

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

Configure SCHEDULED_QUERIES in config.py and press the Schedule button in Sqllab

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags: SCHEDULED_QUERIES
• 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 #20256 (d60af23) into master (c8fe518) will increase coverage by 0.32%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master   #20256      +/-   ##
==========================================
+ Coverage   66.47%   66.79%   +0.32%     
==========================================
  Files        1727     1754      +27     
  Lines       64724    65562     +838     
  Branches     6822     6933     +111     
==========================================
+ Hits        43024    43794     +770     
- Misses      19969    20014      +45     
- Partials     1731     1754      +23     

Flag	Coverage Δ
hive	53.77% <100.00%> (+0.08%)	⬆️
mysql	82.36% <100.00%> (+0.20%)	⬆️
postgres	82.43% <100.00%> (+0.21%)	⬆️
presto	53.63% <100.00%> (+0.08%)	⬆️
python	82.86% <100.00%> (+0.22%)	⬆️
sqlite	82.22% <100.00%> (+0.26%)	⬆️
unit	50.64% <100.00%> (+1.18%)	⬆️

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

Impacted Files	Coverage Δ
...rc/SqlLab/components/ScheduleQueryButton/index.tsx	20.75% <ø> (ø)
superset/config.py	91.44% <100.00%> (+0.02%)	⬆️
...oard/components/gridComponents/new/NewMarkdown.jsx	0.00% <0.00%> (-100.00%)	⬇️
...s/legacy-plugin-chart-sunburst/src/controlPanel.ts	16.66% <0.00%> (-83.34%)	⬇️
...s/plugin-chart-echarts/src/BoxPlot/controlPanel.ts	16.66% <0.00%> (-83.34%)	⬇️
...gins/legacy-plugin-chart-chord/src/controlPanel.ts	25.00% <0.00%> (-75.00%)	⬇️
.../legacy-plugin-chart-world-map/src/controlPanel.ts	25.00% <0.00%> (-75.00%)	⬇️
...gins/legacy-plugin-chart-rose/src/controlPanel.tsx	50.00% <0.00%> (-50.00%)	⬇️
...ins/legacy-plugin-chart-sankey/src/controlPanel.ts	50.00% <0.00%> (-50.00%)	⬇️
...s/legacy-plugin-chart-calendar/src/controlPanel.ts	50.00% <0.00%> (-50.00%)	⬇️
... and 336 more

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[villebro]

@RahulRaj97 thanks for this fix. I started looking into this, and I noticed the following:

• When non-boolean properties from the FEATURE_FLAGS config were moved to top level config parameters in fix: feature flags typing #15254, the docs weren't updated to reflect the change (see https://github.com/apache/superset/blob/master/docs/docs/installation/alerts-reports.mdx#schedule-reports ). To avoid further confusion, we should also fix the docs.
• There's no placeholder for the SCHEDULED_QUERIES parameter in config.py. I think we should add one to correspond with what's covered in the docs.

[RahulRaj97]

@villebro Thanks for reviewing the PR and clarifying the flags too. I was having the same issue while working on this and adding the SCHEDULED_QUERIES config inside FEATURE_FLAGS wasn't working for me so I tried adding it to the top-level config and it worked.