Unify and enchance conrtainer tracer logging

[tzstoyanov]

Currently a mix of prints and logs are used to dump important runtime information

• Use go log module for logging, replace all prints with logs.
• Add verbosity levels and categories of the logs.
• Implement logic for setting the verbosity and category of the logs, at startup and runtime.
• Sort the existing logs to appropriate verbosity and category and use the relevant log function.
• Add more informational, debug and warning logs.