[stable8] perf(NcTimezonePicker): use Intl to reduce self-size from 206kb to 2kb

[ShGKme]

☑️ Resolves

• Manual backport: perf(NcTimezonePicker): use Intl to reduce self-size from 206kb to 2kb  #7522
• On top of: [stable8] refactor(NcTimezonePicker): migrate component to Typescript #8075

[codecov]

Codecov Report

❌ Patch coverage is 25.00000% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.02%. Comparing base (daa4b70) to head (9ade043).
⚠️ Report is 3 commits behind head on stable8.

Files with missing lines	Patch %	Lines
src/components/NcTimezonePicker/timezoneUtils.ts	0.00%	5 Missing ⚠️
...c/components/NcTimezonePicker/NcTimezonePicker.vue	42.85%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           stable8    #8076      +/-   ##
===========================================
+ Coverage    45.99%   46.02%   +0.03%     
===========================================
  Files          192      192              
  Lines         4770     4760      -10     
  Branches      1168     1165       -3     
===========================================
- Hits          2194     2191       -3     
+ Misses        2490     2483       -7     
  Partials        86       86              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[Antreesy]

Still good