feat: Enable configuration of hostnames for hotrod services

[w-h-a]

Which problem is this PR solving?

Resolves #6774

We want to allow users to configure the hostnames of the Hotrod services. This would allow users of the example app to run the services as separate containers.

Description of the changes

The main change is to add hostname flags for each service. We pass these in as part of the command when running the containers.

How was this change tested?

Example docker-compose usage:

hotrod-frontend:
    container_name: hotrod-frontend
    image: hotrod:0.1.0-alpha.2
    ports:
      - '8080:8080'
    command: ["frontend", "--customer-service-hostname", "hotrod-customer", "-c", "8081", "--driver-service-hostname", "hotrod-driver", "-d", "8082", "--route-service-hostname", "hotrod-route", "-r", "8083"]

hotrod-customer:
  container_name: hotrod-customer
  image: ...

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

[yurishkuro]

Thanks!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.06%. Comparing base (ce07285) to head (c035f19).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6782      +/-   ##
==========================================
+ Coverage   96.03%   96.06%   +0.02%     
==========================================
  Files         363      364       +1     
  Lines       20677    20690      +13     
==========================================
+ Hits        19857    19875      +18     
+ Misses        626      622       -4     
+ Partials      194      193       -1     

Flag	Coverage Δ
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badger_v2	1.89% <ø> (+0.06%)	⬆️
cassandra-4.x-v1-manual	14.86% <ø> (+0.05%)	⬆️
cassandra-4.x-v2-auto	1.88% <ø> (+0.06%)	⬆️
cassandra-4.x-v2-manual	1.88% <ø> (+0.06%)	⬆️
cassandra-5.x-v1-manual	14.86% <ø> (+0.05%)	⬆️
cassandra-5.x-v2-auto	1.88% <ø> (+0.06%)	⬆️
cassandra-5.x-v2-manual	1.88% <ø> (+0.06%)	⬆️
elasticsearch-6.x-v1	19.19% <ø> (+0.04%)	⬆️
elasticsearch-7.x-v1	19.27% <ø> (+0.04%)	⬆️
elasticsearch-8.x-v1	19.44% <ø> (+0.04%)	⬆️
elasticsearch-8.x-v2	1.89% <ø> (+0.06%)	⬆️
grpc_v1	10.86% <ø> (+0.05%)	⬆️
grpc_v2	7.86% <ø> (+0.06%)	⬆️
kafka-3.x-v1	10.11% <ø> (-0.02%)	⬇️
kafka-3.x-v2	1.89% <ø> (+0.06%)	⬆️
memory_v2	1.89% <ø> (+0.06%)	⬆️
opensearch-1.x-v1	19.32% <ø> (+0.04%)	⬆️
opensearch-2.x-v1	19.32% <ø> (+0.04%)	⬆️
opensearch-2.x-v2	1.89% <ø> (+0.06%)	⬆️
tailsampling-processor	0.48% <ø> (-0.01%)	⬇️
unittests	94.94% <ø> (+0.02%)	⬆️

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