Define a common format for logs in Hyperlight

At the moment, Hyperlight logs do not have a set format to follow and this leads to confusion when following logs.
It would be best to define a common format that all the internal logs in Hyperlight should follow to have a consistent approach.

Consider structured logging.

Artifacts:
- [Proposal doc](https://docs.google.com/document/d/1JqWxqdFtAOB0HkUmt3bki3gT5oWkcqbkfRlZ-JRZz5s/edit?usp=sharing)
- [Conv starter](https://hackmd.io/IjxN8GqMRE6zwrCt4_vWaA)