chore: Moves spec files to the src folder - iteration 7

[michael-s-molina]

SUMMARY

• Moves spec files to the src folder - iteration 7
• Organizes the SqlLab component structure
• Standardizes the extension of the test files

This work is part of SIP-61

TESTING INSTRUCTIONS

1 - Execute all tests
2 - All tests should pass

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

[codecov]

Codecov Report

Merging #16943 (dc8809d) into master (6225c9a) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head dc8809d differs from pull request most recent head c39d154. Consider uploading reports for the commit c39d154 to get more accurate results

@@            Coverage Diff             @@
##           master   #16943      +/-   ##
==========================================
+ Coverage   76.90%   76.91%   +0.01%     
==========================================
  Files        1024     1025       +1     
  Lines       54931    54951      +20     
  Branches     7486     7488       +2     
==========================================
+ Hits        42246    42267      +21     
+ Misses      12437    12436       -1     
  Partials      248      248              

Flag	Coverage Δ
javascript	71.06% <100.00%> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
...d/src/SqlLab/components/AceEditorWrapper/index.tsx	58.75% <ø> (ø)
...erset-frontend/src/SqlLab/components/App/index.jsx	57.14% <ø> (ø)
...tend/src/SqlLab/components/ColumnElement/index.tsx	95.45% <ø> (ø)
...qlLab/components/EstimateQueryCostButton/index.jsx	20.83% <ø> (ø)
...lLab/components/ExploreCtasResultsButton/index.jsx	7.69% <ø> (ø)
...c/SqlLab/components/ExploreResultsButton/index.jsx	92.00% <ø> (ø)
...d/src/SqlLab/components/QueryAutoRefresh/index.jsx	65.90% <ø> (ø)
...c/SqlLab/components/RunQueryActionButton/index.tsx	65.11% <ø> (ø)
...d/src/SqlLab/components/SaveDatasetModal/index.tsx	88.23% <ø> (ø)
...frontend/src/SqlLab/components/SaveQuery/index.tsx	75.55% <ø> (ø)
... and 19 more

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[geido]

LGTM! Thanks for the improvement!