fix(systemtags): Migrate admin settings to vue for accessibility

[susnux]

• Resolves part of [BITV] Replace all places with old NcMultiselect components with NcSelect components #40588

Summary

This migrates the admin settings of systemtags to Vue to have accessible multiselect.

Screenshots

before	after

Screen cast (with this changes)

Works with 320px width and 250px height.

vokoscreenNG-2023-11-15_21-27-01.mp4

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[susnux]

#41335