support for interface list changes

[ldegio]

Changes in the machine network interfaces should be detected (for example by polling the interface list every 30 seconds) and the list should be updated in the libsinsp state.

Also, a new interface list block should be added to the dump file if dump to disk is enabled. This means that the dump file read code should handle interface blocks in the middle of event blocks.

[github-actions[bot]]

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