Add support for finding oxide processes on a sled

[papertigers]

This PR adds support for finding all oxide processes via libcontract and relying on the fact that we deploy oxide services with the fmri prefix svc:/oxide/ or svc:/system/illumos. This allows us to find every pid started via smf even if the smf script uses ctrun.

You can see this for yourself by running pfexec ctstat -av on a helios/illumos based system:

205     1       process owned   2492    0       -       -       
        cookie:                0
        informative event set: core
        critical event set:    hwerr empty
        fatal event set:       hwerr
        parameter set:         noorphan regent
        member processes:      2497
        inherited contracts:   none
        service fmri:          svc:/oxide/wicketd:default
        service fmri ctid:     204
        creator:               ctrun
        aux:                   
249     1       process owned   1334    0       -       -       
        cookie:                0x20
        informative event set: none
        critical event set:    hwerr empty
        fatal event set:       none
        parameter set:         inherit regent
        member processes:      2794
        inherited contracts:   none
        service fmri:          svc:/oxide/dendrite:default
        service fmri ctid:     249
        creator:               svc.startd
        aux:                   start
254     1       process owned   1334    0       -       -       
        cookie:                0x20
        informative event set: none
        critical event set:    hwerr empty
        fatal event set:       none
        parameter set:         inherit regent
        member processes:      2802
        inherited contracts:   none
        service fmri:          svc:/oxide/lldpd:default
        service fmri ctid:     254
        creator:               svc.startd
        aux:                   start

This PR is on top of:

• Pull support-bundle/queries into a standalone crate #7193

[papertigers]

This PR is actually a redo of #7194 because I mistakenly merged the PR into the wrong branch...