KAFKA-1614: Partition log directory and segments info exposed via JMX

[everpcpc]

An updated version for #1196

[DarrenBishop]

What's the process for getting this (and perhaps its predecessor) PRs merged?
What needs to be addressed with the build checks?

[everpcpc]

The build check error seems not related to the changes.

[vykimo]

still not on master branch?

[m1losz]

is this gonna get merged to master soon?

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[github-actions]

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