[Explore] Add empty data validation to prevent visualization errors

[AnshMohta-cloud]

• Add data validation check before visualization processing
• Only process visualizations when transformedData has content
• Maintain error throwing for invalid visualization rules
• Add comprehensive test coverage for empty data scenarios
• Improve robustness of explore embeddable component

Description

Issues Resolved

Screenshot

Testing the changes

Changelog

• fix: add empty data validation to prevent visualization errors

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[github-actions]

ℹ️ Manual Changeset Creation Reminder

Please ensure manual commit for changeset file 10801.yml under folder changelogs/fragments to complete this PR.

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[github-actions]

❌ Changeset File Not Added Yet

Please ensure manual commit for changeset file 10801.yml under folder changelogs/fragments to complete this PR. File still missing.

[github-actions]

❌ Changeset File Not Added Yet

Please ensure manual commit for changeset file 10801.yml under folder changelogs/fragments to complete this PR. File still missing.

[codecov]

Codecov Report

❌ Patch coverage is 28.57143% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.52%. Comparing base (0172967) to head (50a1c83).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...s/explore/public/embeddable/explore_embeddable.tsx	28.57%	8 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10801      +/-   ##
==========================================
- Coverage   60.53%   60.52%   -0.01%     
==========================================
  Files        4511     4511              
  Lines      121297   121298       +1     
  Branches    20237    20238       +1     
==========================================
- Hits        73422    73421       -1     
- Misses      42731    42733       +2     
  Partials     5144     5144              

Flag	Coverage Δ
Linux_1	26.56% <ø> (ø)
Linux_2	38.82% <ø> (ø)
Linux_3	39.07% <ø> (ø)
Linux_4	33.62% <28.57%> (+<0.01%)	⬆️
Windows_1	26.57% <ø> (ø)
Windows_2	38.79% <ø> (ø)
Windows_3	39.08% <ø> (+<0.01%)	⬆️
Windows_4	33.62% <28.57%> (-0.01%)	⬇️

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[github-actions]

❌ Invalid Prefix For Manual Changeset Creation

Invalid description prefix. Found "fix". Only "skip" entry option is permitted for manual commit of changeset files.

If you were trying to skip the changelog entry, please use the "skip" entry option in the ##Changelog section of your PR description.

[ashwin-pc]

Second approver since Owen approved