Add allow_ddm_traffic to PortConfig - #11091

control: job assigned to worker 01M0EJMJBQV1G6J6VQ4QQWM36W [factory aws, i-0d0f59da485ad3b29] (queued for 51 s)
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task: starting task 0: "setup"
task: process exited: duration 4107 ms, exit code 0
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task: starting task 1: "rust-toolchain"
task: process exited: duration 18107 ms, exit code 0
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task: starting task 2: "authentication"
task: process exited: duration 32124 ms, exit code 0
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task: starting task 3: "clone repository"
task: process exited: duration 13699 ms, exit code 0
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task: starting task 4: "build"
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| info: running `cargo check --bins` on zone-setup (337/337)
| warning: profile package spec `blake2b_simd` in profile `dev` did not match any packages
| warning: profile package spec `rust-argon2` in profile `dev` did not match any packages
|     Checking uzers v0.12.2
|     Checking zone-setup v0.1.0 (/work/oxidecomputer/omicron/zone-setup)
|     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.71s
| 
| real    14:03.126997127
| user    21:21.961418068
| sys      4:22.114505608
| trap        0.338722997
| tflt        0.620056102
| dflt        0.844973598
| kflt        0.005142684
| lock  1:29:41.677219717
| slp   1:41:13.855783793
| lat        57.008925345
| stop     4:01.323903033
task: process exited: duration 974038 ms, exit code 0
|W| found 0 output files