[Feature]: Improve logging of beats

[widhalmt]

Describe the feature request

We have several hardcoded options in our logging configuration for beats.

The most important changes I see:

• Make count of rotated and kept files a variable (with default)
• Make permissions of logfiles a variable and make the default more restrictive than what it is now

Thinking of it I like to have a "global" default for all beats with an option to overwrite it per beat.