feat: enable prequery suggestions only for variant group

[katrinan029]

Updated logic to ensure that prequery suggestions are only displayed for users in the variant group.

https://2u-internal.atlassian.net/browse/ENT-8559

Merge checklist:

• Evaluate how your changes will impact existing consumers (e.g., frontend-app-learner-portal-enterprise, frontend-app-admin-portal, and frontend-app-enterprise-public-catalog). Will consumers safely be able to upgrade to this change without any breaking changes?
• Ensure your commit message follows the semantic-release conventional commit message format. If your changes include a breaking change, ensure your commit message is explicitly marked as a BREAKING CHANGE so the NPM package is released as such.
• Once CI is passing, verify the package versions that Lerna will increment to in the Github Action CI workflow logs.
  • Note: This may be found in the "Preview Updated Versions (dry run)" step in the Github Action CI workflow logs.

Post merge:

• Verify Lerna created a release commit (e.g., chore(release): publish) that incremented versions in relevant package.json and CHANGELOG files, and created Git tags for those versions.
• Run the Publish from package.json Github Action workflow to publish these new package versions to NPM.
  • This may be triggered by clicking the "Run workflow" option for the master branch.
• Verify the new package versions were published to NPM (i.e., npm view <package_name> versions --json).
  • Note: There may be a slight delay between when the workflow finished and when NPM reports the package version as being published. If it doesn't appear right away in the above command, try again in a few minutes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.67%. Comparing base (45d9db9) to head (a367ee1).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #377      +/-   ##
==========================================
+ Coverage   78.64%   78.67%   +0.03%     
==========================================
  Files          35       35              
  Lines         693      694       +1     
  Branches      176      177       +1     
==========================================
+ Hits          545      546       +1     
  Misses        135      135              
  Partials       13       13              

Files	Coverage Δ
...atalog-search/src/PrequerySearchSuggestionItem.jsx	100.00% <100.00%> (ø)
packages/catalog-search/src/SearchBox.jsx	88.88% <ø> (ø)
packages/catalog-search/src/SearchHeader.jsx	92.30% <ø> (ø)
...ckages/catalog-search/src/SearchSuggestionItem.jsx	100.00% <100.00%> (ø)
packages/catalog-search/src/SearchSuggestions.jsx	100.00% <ø> (ø)

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[kiram15]

Looks good to me!