[gomobile-lib] improve go logger -> native logger binding

[aeddi]

Replace gomobile logger (GoLog) by a better binding for ipfs-go-log -> native logger.

Currently, all logs including their metadata are displayed by native logger as a plain text string with GoLog as namespace/tag and error as level. Logs are less readable, filterable, sortable, etc...

We need to forward each metadata (level, namespace, timestamp, etc...) and the log itself from ipfs-go-log to corresponding functions/parameters of Android logcat and iOS os_log.