fix(ui) Fix unsafe destructuring of assertion in UI

[chriscollins3456]

We got a report of a white screen of death when loading the assertions tab on a dataset. It was due to a scenario where the datasetAssertionInfo is null and we destructure off of it. This was happening in DatasetAssertionsList component when generating the column with the result and description.

Ideally we would never get into this scenario but that would require a bigger refactor I don't have time to get into right now. So now we just handle the unsafe destructuring properly.

[alwaysmeticulous]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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[codecov]

Bundle Report

Changes will increase total bundle size by 4 bytes (0.0%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
datahub-react-web-esm	28.85MB	4 bytes (0.0%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: datahub-react-web-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/index-*.js	4 bytes	19.22MB	0.0%

Files in assets/index-*.js:

• ./src/app/entityV2/shared/tabs/Dataset/Validations/DatasetAssertionDescription.tsx → Total Size: 13.89kB