feat: upgrade react router to v6

[Syed-Ali-Abbas-Zaidi]

Ticket

React Router Upgrade to v6.

Description

This PR upgrades React Router from v5 to v6.

BREAKING CHANGES

• Upgrade react-router-dom from v5 to v6
• Upgrade frontend-platform from v4 to v5.

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

Merging #344 (01f239a) into master (5241cc1) will not change coverage.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #344   +/-   ##
=======================================
  Coverage   78.26%   78.26%           
=======================================
  Files          34       34           
  Lines         667      667           
  Branches      172      172           
=======================================
  Hits          522      522           
  Misses        132      132           
  Partials       13       13           

Files Changed	Coverage Δ
...ckages/catalog-search/src/SearchSuggestionItem.jsx	100.00% <ø> (ø)
packages/utils/src/test-utils.jsx	0.00% <ø> (ø)
packages/catalog-search/src/SearchContext.jsx	100.00% <100.00%> (ø)

... and 3 files with indirect coverage changes

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[adamstankiewicz]

LGTM! To verify, will these changes will be released as a major, breaking release?

[Syed-Ali-Abbas-Zaidi]

Yes, This will be a major release.