Use topo instead of devinfo for disks, make location required - #11590

control: job assigned to worker 01M6MNS0V7DS7T9DRBRA6H2EXD [factory aws, i-02a74ef9f6cfda5e1] (queued for 52 s)
...
task: starting task 0: "setup"
task: process exited: duration 3145 ms, exit code 0
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task: starting task 1: "rust-toolchain"
task: process exited: duration 17433 ms, exit code 0
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task: starting task 2: "authentication"
task: process exited: duration 18 ms, exit code 0
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task: starting task 3: "clone repository"
task: process exited: duration 19556 ms, exit code 0
...
task: starting task 4: "build"
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| a out/probe.tar.gz 3037K
| a out/propolis-server.tar.gz 37167K
| a out/pumpkind-gz.tar 26647K
| a out/switch-softnpu.tar.gz 334718K
| 
| real     1:05.971822837
| user     1:03.834284380
| sys         3.526550248
| trap        0.004191223
| tflt        0.000000000
| dflt        0.000000000
| kflt        0.000000000
| lock        0.000000000
| slp      1:03.768978441
| lat         0.805354746
| stop        0.000170430
task: process exited: duration 994564 ms, exit code 0
|W| found 1 output files
|W| uploading: /work/package.tar.gz (1870684939 bytes)
|W| uploaded: /work/package.tar.gz