Add allow_ddm_traffic to PortConfig - #11091

control: job assigned to worker 01M0EJMEPTCA3EZ1EWRRQQS3P1 [factory aws, i-0ddd05cb83b7b5c49] (queued for 1 m 0 s)
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task: starting task 0: "setup"
task: process exited: duration 4124 ms, exit code 0
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task: starting task 1: "rust-toolchain"
task: process exited: duration 18981 ms, exit code 0
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task: starting task 2: "authentication"
task: process exited: duration 22113 ms, exit code 0
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task: starting task 3: "clone repository"
task: process exited: duration 12881 ms, exit code 0
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task: starting task 4: "build"
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|  Documenting omicron-uuid-kinds v0.1.0 (/work/oxidecomputer/omicron/uuid-kinds)
|  Documenting dev-tools-common v0.1.0 (/work/oxidecomputer/omicron/dev-tools/common)
|     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7m 32s
| warning: the following packages contain code that will be rejected by a future version of  [...]
| note: to see what the problems were, use the option `--future-incompat-report`, or run `ca [...]
|    Generated /work/oxidecomputer/omicron/target/doc/api_identity/index.html and 205 other  [...]
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| real     7:32.223105544
| user    20:21.854687993
| sys      4:24.851610913
| trap        0.295413099
| tflt        0.005764080
| dflt        0.102499798
| kflt        0.000028690
| lock  7:12:06.234051612
| slp   2:32:00.542188092
| lat        33.574070609
| stop     2:07.595634626
task: process exited: duration 838202 ms, exit code 0
|W| found 0 output files