Convert NameSelector.tsx from class component to functional component

[Parship999]

Which problem is this PR solving?

• Resolves part of [Feature]: Refactor class components to functional components #2610

Description of the changes

• Converted the following components to functional components:
  • NameSelector.tsx

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: npm run lint and npm run test

[graphite-app]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.59%. Comparing base (5b05b9d) to head (2c6284d).
Report is 21 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2889      +/-   ##
==========================================
+ Coverage   97.56%   97.59%   +0.02%     
==========================================
  Files         256      256              
  Lines        7973     7967       -6     
  Branches     2062     2084      +22     
==========================================
- Hits         7779     7775       -4     
+ Misses        194      192       -2     

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