fix(sqllab): rendering performance regression

[justinpark]

SUMMARY

When a schema contains a humorous table list, rendering cost of SqlEditorLeftBar is heavy since it requires to iterate millions items. To avoid the lag of using sql editor, we should avoid the LeftBar rendering while typing.
This commit removes the unnecessary immediate QUERY_EDITOR_SET_SQL action (and it's already covered by the next line setQueryEditorAndSaveSqlWithDebounce function) while typing which triggers the re-rendering of SqlEditorLeftBar.

(Still need refactoring SqlEditor to avoid observing all sqlEditor updates. I will follow up additional work once redux-toolkit (+r eact-query) migration completed)

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

After (no lag while typing):

after--rendering-perf.mov

Before (typing at same speed):

before--rendering-perf.mov

TESTING INSTRUCTIONS

open sqllab with a list of > 100,000 tables
typing in the sql editor

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

[michael-s-molina]

LGTM

[codecov]

Codecov Report

Merging #23653 (af6ebaf) into master (825006d) will increase coverage by 0.00%.
The diff coverage is n/a.

❗ Current head af6ebaf differs from pull request most recent head b7edd68. Consider uploading reports for the commit b7edd68 to get more accurate results

@@           Coverage Diff           @@
##           master   #23653   +/-   ##
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  Coverage   67.93%   67.94%           
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  Files        1918     1918           
  Lines       73891    73890    -1     
  Branches     8058     8058           
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+ Hits        50199    50204    +5     
+ Misses      21633    21625    -8     
- Partials     2059     2061    +2     

Flag	Coverage Δ
javascript	53.90% <ø> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
...frontend/src/SqlLab/components/SqlEditor/index.jsx	58.60% <ø> (+1.91%)	⬆️

... and 1 file with indirect coverage changes

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