Unit test to reproduce data race when reloading TLF config

[chahatsagarmain]

Which problem is this PR solving?

• Part of [Bug]: race condition when reloading TLS certificates #4316

Description of the changes

• Added unit to test to check for data race

How was this change tested?

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

All modified and coverable lines are covered by tests ✅

Project coverage is 48.93%. Comparing base (2b7cf3a) to head (3d175ce).

❗ There is a different number of reports uploaded between BASE (2b7cf3a) and HEAD (3d175ce). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (2b7cf3a)	HEAD (3d175ce)
unittests	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #6213       +/-   ##
===========================================
- Coverage   96.50%   48.93%   -47.58%     
===========================================
  Files         354      178      -176     
  Lines       20127    10774     -9353     
===========================================
- Hits        19424     5272    -14152     
- Misses        520     5060     +4540     
- Partials      183      442      +259     

Flag	Coverage Δ
badger_v1	8.31% <ø> (ø)
badger_v2	1.67% <ø> (ø)
cassandra-4.x-v1	14.39% <ø> (ø)
cassandra-4.x-v2	1.61% <ø> (ø)
cassandra-5.x-v1	14.39% <ø> (ø)
cassandra-5.x-v2	1.61% <ø> (ø)
elasticsearch-6.x-v1	18.60% <ø> (+<0.01%)	⬆️
elasticsearch-7.x-v1	18.68% <ø> (ø)
elasticsearch-8.x-v1	18.85% <ø> (ø)
elasticsearch-8.x-v2	1.66% <ø> (-0.02%)	⬇️
grpc_v1	9.48% <ø> (ø)
grpc_v2	7.00% <ø> (ø)
kafka-v1	8.88% <ø> (ø)
kafka-v2	1.67% <ø> (ø)
memory_v2	1.67% <ø> (+0.01%)	⬆️
opensearch-1.x-v1	18.73% <ø> (ø)
opensearch-2.x-v1	18.72% <ø> (-0.01%)	⬇️
opensearch-2.x-v2	1.66% <ø> (-0.02%)	⬇️
tailsampling-processor	0.46% <ø> (ø)
unittests	?

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