chore: add a witness for `enum_variant_missing` #2937

Job	Run time
Check lint and rustfmt	48s
Build binary (Windows)	1m 47s
Build binary	31s
Semver: core-graphics	55s
Run tests (1.77, false)	2m 44s
Check if version changed	4m 18s
Run tests (1.78, false)	2m 59s
Run tests (1.79, false)	2m 52s
Run tests (1.80, false)	3m 1s
Run tests (1.81, false)	2m 55s
Run tests (stable, false)	2m 45s
Run tests (beta, false)	2m 10s
Run tests (nightly, true)	3m 0s
Semver: libp2p-core 0.37.0	52s
Caching across rustdoc versions	1m 27s
Caching with feature config changed	27s
Check failure when installed rustc is too old	18s
Semver: bevy_core v0.9.0	48s
Semver: bevy_gltf v0.9.1	1m 7s
Semver: clap v3.2.0	57s
Semver: libp2p-dcutr 1.62.0 and libp2p-relay 0.14.0	1m 21s
Semver: libp2p-gossipsub ~0.44.0 + libp2p-request-response ~0.24.0	1m 24s
Semver: libp2p-uds 0.37.0	53s
Semver: dependency has warnings with "-Dwarnings" (libp2p v0.53.1)	1m 47s
Semver: perf-event-open-sys2 v5.0.0	21s
Semver: ref-slice fork (git)	24s
Semver: sqllogictest v0.13.0	33s
Semver: ref-slice fork (sparse)	18s
Semver: tokio ~v1.25.0 (explicit)	4s
Semver: tokio ~v1.25.0 (implicit)	5s
Semver: ref-slice fork (Windows) (git)	59s
Semver: ref-slice fork (Windows) (sparse)	43s
All CI stages	1s
Check for semver compliance	0s
Run the release workflow	0s
	45m 34s

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