Always log error exception for block production

[tbenr]

I know @rolfyone is opinionated on this, but I'd like to have more info by default when block production fails

Documentation

• I thought about documentation and added the doc-change-required label to this PR if updates are required.

Changelog

• I thought about adding a changelog entry, and added one if I deemed necessary.

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Note

Update ValidatorLogger.dutyFailed to log exceptions at error level for block production and when trace is enabled, omitting exceptions otherwise.

• Logging:
  • ValidatorLogger.dutyFailed: Adjust error logging to include the exception only when log.isTraceEnabled() or producedType == "block"; otherwise log the message without the throwable.

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[StefanBratanov]

LGTM from my perspective. I had to modify that piece of code for debugging so it seems sensible to enable it specifically for block production. Will leave to others for final approval and other opinions.

[rolfyone]

LGTM, just dont want it as the default all the time because we spam the hell out of our logs sometimes without thinking.