Add the sush proxy to the switch zone - #11253

control: job assigned to worker 01M28YJRMJ7KW9WXCT3QKZKWSM [factory aws, i-002ddcef634dfcf7d] (queued for 47 s)
...
task: starting task 0: "setup"
task: process exited: duration 4166 ms, exit code 0
...
task: starting task 1: "rust-toolchain"
task: process exited: duration 17038 ms, exit code 0
...
task: starting task 2: "authentication"
task: process exited: duration 23 ms, exit code 0
...
task: starting task 3: "clone repository"
task: process exited: duration 15254 ms, exit code 0
...
task: starting task 4: "build"
...
| + unset TMPDIR
| + echo 'files in /var/tmp/omicron_tmp (none expected on success):'
| files in /var/tmp/omicron_tmp (none expected on success):
| + find /var/tmp/omicron_tmp -ls
| 137734   39 drwxr-xr-x   2 build    build           2 Sep 11 19:55 /var/tmp/omicron_tmp
| + rmdir /var/tmp/omicron_tmp
task: process exited: duration 2040369 ms, exit code 0
|W| found 6 output files
|W| uploading: /work/cargo-build-analysis.jsonl (1866748 bytes)
|W| uploaded: /work/cargo-build-analysis.jsonl
|W| uploading: /work/environment.json (108 bytes)
|W| uploaded: /work/environment.json
|W| uploading: /work/oxidecomputer/omicron/target/nextest/ci/junit.xml (683060 bytes)
|W| uploaded: /work/oxidecomputer/omicron/target/nextest/ci/junit.xml
|W| uploading: /work/oxidecomputer/omicron/target/live-tests-archive.tgz (291977216 bytes)
|W| uploaded: /work/oxidecomputer/omicron/target/live-tests-archive.tgz
|W| uploading: /tmp/nextest-run-archive.zip (3266220 bytes)
|W| uploaded: /tmp/nextest-run-archive.zip
|W| uploading: /tmp/nextest-chrome-trace.json (4350750 bytes)
|W| uploaded: /tmp/nextest-chrome-trace.json