Remove modern syntax in NotificationInline

[connor-baer]

Purpose

Modern JavaScript syntax isn't transpiled in Circuit UI and can lead to build issues in apps that consume Circuit UI.

Approach and changes

• Removed optional chaining in the NotificationInline component
• Bonus: Automatically clean up build artifacts before running yarn bootstrap

Definition of done

• Development completed
• Reviewers assigned
• Unit and integration tests
• Meets minimum browser support
• Meets accessibility requirements

[changeset-bot]

🦋 Changeset detected

Latest commit: 0a2537a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@sumup/circuit-ui	Patch

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[vercel]

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🔍 Inspect: https://vercel.com/sumup/oss-circuit-ui/8AfMcoL12ptAFnY5jEKLDkYL3NYy
✅ Preview: https://oss-circuit-ui-git-bugfix-optional-chaining-sumup.vercel.app

[codecov]

Codecov Report

Merging #1435 (0a2537a) into main (1f5c5fa) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1435      +/-   ##
==========================================
+ Coverage   92.31%   92.33%   +0.02%     
==========================================
  Files         193      193              
  Lines        3889     3889              
  Branches     1213     1213              
==========================================
+ Hits         3590     3591       +1     
+ Misses        280      279       -1     
  Partials       19       19              

Impacted Files	Coverage Δ
...mponents/NotificationInline/NotificationInline.tsx	92.72% <100.00%> (ø)
...mponents/NotificationBanner/NotificationBanner.tsx	83.60% <0.00%> (+1.63%)	⬆️