fix(sqllab): missing column meta on autocomplete

[justinpark]

SUMMARY

Hotfix for regression from #24371
After table extended metadata discarded from sqlLab state, columns are no longer exists within extendedTables.
This commit adds the logic to extract the columns metadata from rdk query selectors.
FYI: Since AceEditorWrapper is hard to test the autocomplete specs, I'm planning to add specs for this including other autocomplete items in the upcoming PRs that will refactor setWords by a hook

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

After:

after--columns-meta.mov

Before:

before--columns-meta.mov

TESTING INSTRUCTIONS

Enable autocomplete
Type some column name and check the autocomplete list including column names

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]

cc: @sadpandajoe

[michael-s-molina]

LGTM given that tests will be added in a follow-up.

[EugeneTorap]

Hi @rusackas @kgabryje! Can we merge it?

[michael-s-molina]

Hi @rusackas @kgabryje! Can we merge it?

@EugeneTorap It's generally a good practice to let the PR author to merge their PRs if they are committers to avoid ahead of time merges. @justinpark is a committer 😉