Dedupe compatible_sled_cpu_families across {Instance,Vmm}CpuPlatform - #11697

control: job assigned to worker 01M6HYQ3ZMKEW24162HK9QWEM5 [factory aws, i-0045a6883e13c2be2] (queued for 30 s)
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|      Running `/home/build/.rustup/toolchains/1.99.1-x86_64-unknown-linux-gnu/bin/rustdoc - [...]
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|    Doc-tests wicketd_api
|      Running `/home/build/.rustup/toolchains/1.99.1-x86_64-unknown-linux-gnu/bin/rustdoc - [...]
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| running 2 tests
| test wicketd-api/src/lib.rs - wicketd_api_mod::api_description (line 48) ... ignored
| test wicketd-api/src/lib.rs - wicketd_api_mod::stub_api_description (line 54) ... ignored
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| test result: ok. 0 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out; finished in 0. [...]
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|    Doc-tests wicketd_client
|      Running `/home/build/.rustup/toolchains/1.99.1-x86_64-unknown-linux-gnu/bin/rustdoc - [...]
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