Add Integration Test

[AntyaDev]

• Spin up in Docker OTEL API, which can accept metrics and can be queried to get results
• Check that ReportingSink can write metrics by querying them from the OTEL API
• Add integration tests to verify that the logger writes an error log when it can't reach the OTEL API. (consider using Serilog in memory sink)
• Add test that verify Grpc and HTTP protocols are supported