feat: Implement EmptyState components

[kgabryje]

SUMMARY

Implement "empty state" components, which will be used as:

• chart placeholder in explore before query is run or query returns no results
• data table placeholder in explore before query is run or query returns no results
• placeholder in metrics/columns popovers in explore if there are no saved metrics/expressions in dataset
• placeholders in dashboard edit mode when no element is added to dashboard
• placeholder in native filters bar when there are no native filters added

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

Take a look at storybook

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

CC @kasiazjc

[codecov]

Codecov Report

Merging #18676 (3d602d2) into master (7c69a1b) will decrease coverage by 0.04%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master   #18676      +/-   ##
==========================================
- Coverage   66.30%   66.25%   -0.05%     
==========================================
  Files        1603     1604       +1     
  Lines       62772    62807      +35     
  Branches     6323     6333      +10     
==========================================
- Hits        41618    41613       -5     
- Misses      19502    19542      +40     
  Partials     1652     1652              

Flag	Coverage Δ
javascript	51.20% <0.00%> (-0.08%)	⬇️

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

Impacted Files	Coverage Δ
...erset-frontend/src/components/EmptyState/index.tsx	0.00% <0.00%> (ø)
...frontend/src/SqlLab/components/SouthPane/index.tsx	63.33% <0.00%> (ø)
...ontend/src/SqlLab/components/QuerySearch/index.tsx	73.07% <0.00%> (ø)
...ntend/src/SqlLab/components/QueryHistory/index.tsx	50.00% <0.00%> (ø)
...legacy-preset-chart-deckgl/src/DeckGLContainer.jsx	0.00% <0.00%> (ø)
...src/dashboard/components/DeleteComponentButton.jsx
...rontend/src/SqlLab/components/QueryTable/index.jsx
...src/dashboard/components/DeleteComponentButton.tsx	100.00% <0.00%> (ø)
...rontend/src/SqlLab/components/QueryTable/index.tsx	68.42% <0.00%> (ø)

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[villebro]

LGTM