A11y-Update für DBSwitch

[sarahbrng]

Proposed changes

Das Problem: Bisher wurden ARIA-Labels beim Laden der Komponente einmalig gesetzt ("Snapshotted"). Bei dynamischen Änderungen zur Laufzeit (z. B. Sprachwechsel via i18n) blieb der Screenreader-Text veraltet.

Die Lösung: Die Inputs ariaLabel und ariaLabelledBy sind nun reaktive Props somit werden Änderungen sofort an das innere input[type="checkbox"] weitergegeben. Der Accessible Name ist immer live aktuell.

aria-label bindet an ariaLabel.

aria-labelledby bindet an ariaLabelledBy.

resolves #5495

Types of changes

• [x ] Bugfix (non-breaking change that fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (improvements to existing components or architectural decisions)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Further comments

🔭🐙🐈 Test this branch here: https://design-system.deutschebahn.com/core-web/review/5495-changing-language-with-aria-labels-not-correctly-applied-to-elements

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[mfranzke]

@sarahbrng only making some of those aria-*-HTML-attribute reactive to changes might not be intuitive to the developers. I would have assumed that the existing mechanism for pass-throughs of those attributes even already takes care of this stuff, elsewhere we should optimize that functionality from my point of view, as this missing functionality would affect other attributes as well.