chore: Add Dynamic Loading Bar Functionality to release-notes.py

[anshgoyalevil]

Which problem is this PR solving?

• related to: CI: modify release-notes.py to auto-categorize pull requests based on labels #4850

Description of the changes

• This PR adds a Dynamic Loading Bar Functionality to release-notes.py
• Knowing exactly what percentage our script is completed processing at each second provides a better UX

How was this change tested?

• Locally
  

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 lines are covered by tests ✅

see 3 files with indirect coverage changes

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