[test] Migrate NewWindowIcon.test.js from Enzyme to RTL

[anshgoyalevil]

Which problem is this PR solving?

• This PR migrates the test NewWindowIcon.test.js from Enzyme to RTL
• part of: Remove dependency on enzyme #1668

How was this change tested?

• using yarn test-ci

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: yarn lint and yarn test

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (fabd2e7) 96.01% compared to head (ec44d04) 96.01%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1701   +/-   ##
=======================================
  Coverage   96.01%   96.01%           
=======================================
  Files         241      241           
  Lines        7562     7562           
  Branches     1987     1987           
=======================================
  Hits         7261     7261           
  Misses        301      301           

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