feat(router): allow exclusion of OTLP metrics via configuration

[Noroth]

Motivation and Context

Currently we can only exclude metrics and labels from Prometheus. This PR adds an option to the configuration to do the exact same for the OTLP metrics configuration.

Checklist

• [ ] I have discussed my proposed changes in an issue and have received approval to proceed.
• [ ] I have followed the coding standards of the project.
• [ ] Tests or benchmarks have been added or updated.
• [ ] Documentation has been updated on https://github.com/wundergraph/cosmo-docs.
• [ ] I have read the Contributors Guide.