Remove existing API key impl and replace it with new Choreo API key impl

[mevan-karu]

Purpose

This PR removes the existing API Key impl and replaces it with the new ChoreoAPIKeyAuthenticator impl.

Issues

Fixes #

Automation tests

• Unit tests added: Yes/No
• Integration tests added: Yes/No

Tested environments

Not Tested

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Maintainers: Check before merge

• [ ] Assigned 'Type' label
• [ ] Assigned the project
• [ ] Validated respective github issues
• [ ] Assigned milestone to the github issue(s)