chore: reduce log noise at default level (#4824)

[attila-lendvai]

Checklist

• I have read the coding guide.
• My change requires a documentation update, and I have done it.
• I have added tests to cover my changes.
• I have filled out the description and linked the related issues.

note that i did not compile the code, because i don't have a go devenv set up.

Description

the log is very noisy at the default (info) level, and arguably with useless information unless someone wants to debug bee's behavior. but the vast majority of the users are node operators, not developers.

more some info log entries to the debug level.

Motivation and Context (Optional)

smaller disk usage, and more readable log on info level.

Related Issue (Optional)

#4824

[attila-lendvai]

i've updated the second commit to remove of the (now duplicate) Debug log, which now does not contain anything extra over the Error level log.