chore: add a witness for `enum_variant_missing` #2935

Job	Run time
Build binary (Windows)	3m 43s
Check lint and rustfmt	19s
Semver: core-graphics	48s
Build binary	31s
Check if version changed	17s
Run tests (1.77, false)	2m 42s
Run tests (1.78, false)	2m 51s
Run tests (1.79, false)	2m 44s
Run tests (1.80, false)	2m 54s
Run tests (1.81, false)	2m 55s
Run tests (stable, false)	2m 52s
Run tests (beta, false)	2m 43s
Run tests (nightly, true)	2m 58s
Caching across rustdoc versions	1m 22s
Check failure when installed rustc is too old	17s
Caching with feature config changed	36s
Semver: bevy_core v0.9.0	37s
Semver: bevy_gltf v0.9.1	1m 8s
Semver: clap v3.2.0	47s
Semver: libp2p-dcutr 1.62.0 and libp2p-relay 0.14.0	1m 15s
Semver: libp2p-gossipsub ~0.44.0 + libp2p-request-response ~0.24.0	1m 15s
Semver: libp2p-uds 0.37.0	1m 1s
Semver: dependency has warnings with "-Dwarnings" (libp2p v0.53.1)	1m 15s
Semver: perf-event-open-sys2 v5.0.0	25s
Semver: ref-slice fork (git)	27s
Semver: libp2p-core 0.37.0	55s
Semver: ref-slice fork (sparse)	17s
Semver: sqllogictest v0.13.0	36s
Semver: tokio ~v1.25.0 (explicit)	2s
Semver: tokio ~v1.25.0 (implicit)	4s
Semver: ref-slice fork (Windows) (git)	1m 15s
Semver: ref-slice fork (Windows) (sparse)	1m 3s
All CI stages	1s
Check for semver compliance	0s
Run the release workflow	0s
	42m 55s

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