refactor(sqllab): nonblocking switch query editor

[justinpark]

SUMMARY

Following up #24539
This commit modifies the setActiveQueryEditor function to asynchronously handle the process of switching active a queryEditor in localStorage in the same way as in non-persistent mode and periodically post active state to persistence via AutoSync's updateCurrentSqlEditor.

This commit made the following changes:

• Modified the process to remove the step of switching the activeQueryEditor based on the persistent mode in switchQueryEditor, and instead changed it to fetchQueryEditor to clearly fetch the persistent queryEditor record from the api
• In persistence mode, changing the active tab will no longer block the query editor data until it is fetched. Instead, the tab will change and a loading state will be displayed [see the following screenshots]
• setActiveQueryEditor has been modified to always apply to localStorage in the same way as in non-persistence mode
• EditorAutoSync will execute updateCurrentSqlEditor periodically and then set lastUpdatedActiveTab on success
• Add the logic of storing localStorage tabHistory for persistence mode

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

In a state of network delay

Before:

before--nonblocking-switch.mov

After:

after--nonblocking-switch.mov

TESTING INSTRUCTIONS

set SQLLAB_BACKEND_PERSISTENCE on
go to sqllab and then switch each tab quickly

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

[justinpark]

/testenv up FEATURE_SQLLAB_BACKEND_PERSISTENCE=true

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