feat(kafka): add logic to handle delimited protobufs

[dreamorosi]

Summary

Changes

Please provide a summary of what's being changed

This PR adds tests to ensure that Protobuf payloads with magic numbers are processed correctly. It also modifies slightly some types and removes unused files from the codebase.

Please add the issue number below, if no issue is present the PR might get blocked and not be reviewed

Issue number: #4070

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[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
8.4% Duplication on New Code

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