PD-1124 Update Hardware Guide Snippet

[micjohnson777]

This PR updates the TNHardwareGuilde.md snippet used in both the CORE and SCALE Hardware Guides with minor style fixes, and adds the Linux command equivalent to the FreeBSD diskinfo command, and adds clarifications about what applies to CORE v/s SCALE. i.e., plugins/jails being CORE and apps being SCALE. Removes extra end-of-line spaces and carriage returns.

Changes can be backported to other release branches, 13.0, 13.3, 23.10, 24.04 or just 13.3 and 24.04.

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