NAS-129460 / 24.10 / add more keys to webui.enclosure.dashboard (per UI team)

[yocalebo]

UI has requested that we add some more keys to the new enclosure endpoint. The summary of these keys are below (NOTE: I'm documenting keys that already exist AS WELL AS the new ones. I'm doing this for posterity sake)

For each enclosure object there are the following keys with their definitions:

1. rackmount: boolean, represents whether the system is "rack mountable"
2. top_loaded: boolean, represents whether the disk drives are loaded into the "top" of the enclosure
3. top_slots: integer, represents the total number of disk bays that are loaded into the "top" of the enclosure
4. front_loaded: boolean, represents whether the disk drives are loaded into the "front" of the enclosure (NOTE: this is an exclusive OR from top_loaded (i.e. they can never be true at the same time))
5. front_slots: integer, represents the total number of disk bays that are loaded into the "front" of the enclosure
6. rear_slots: integer, represents the total number of disk bays that are loaded into the "rear" of the enclosure
7. internal_slots: integer, represents the total number of disk bays that are loaded "internally" (NOTE: we only have 1 platform that has this type of configuration (R30) and internal is a big ambiguous but it's the best we came up with and it's concrete on what it's definition is at this point in time.)

For each disk object there are 4 boolean keys that are all exclusive OR's from each other (i.e. only 1 can be true at any given time)

1. is_top: boolean, represents whether this disk bay in the enclosure is a "top" slot
2. is_front: boolean, represents whether this disk bay in the enclosure is a "front" slot
3. is_rear: boolean, represents whether this disk bay in the enclosure is a "rear" slot
4. is_internal: boolean, represents whether this disk bay in the enclosure is an "internal" slot

Tested these changes on an internal M40.

TODO: another PR to add the minis in this logic, it seems those are ignored in the enclosure_class.py::Enclosure object. Looks like a simple omission when this was written.

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/NAS-129460

[bugclerk]

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