chore: add a witness for `enum_variant_missing` (#978) #2947

Job	Run time
Build binary (Windows)	2m 10s
Build binary	33s
Semver: core-graphics	51s
Check lint and rustfmt	21s
Run tests (1.77, false)	3m 26s
Check if version changed	19s
Run tests (1.78, false)	3m 35s
Run tests (1.79, false)	3m 48s
Run tests (1.80, false)	3m 44s
Run tests (1.81, false)	3m 42s
Run tests (stable, false)	3m 43s
Run tests (beta, false)	3m 35s
Run tests (nightly, true)	3m 34s
Check failure when installed rustc is too old	13s
Caching across rustdoc versions	1m 29s
Semver: bevy_core v0.9.0	37s
Caching with feature config changed	26s
Semver: bevy_gltf v0.9.1	1m 5s
Semver: clap v3.2.0	54s
Semver: libp2p-gossipsub ~0.44.0 + libp2p-request-response ~0.24.0	1m 19s
Semver: libp2p-dcutr 1.62.0 and libp2p-relay 0.14.0	1m 16s
Semver: libp2p-uds 0.37.0	1m 2s
Semver: perf-event-open-sys2 v5.0.0	17s
Semver: dependency has warnings with "-Dwarnings" (libp2p v0.53.1)	1m 15s
Semver: ref-slice fork (git)	24s
Semver: libp2p-core 0.37.0	58s
Semver: ref-slice fork (sparse)	16s
Semver: sqllogictest v0.13.0	43s
Semver: tokio ~v1.25.0 (explicit)	10s
Semver: tokio ~v1.25.0 (implicit)	5s
Semver: ref-slice fork (Windows) (git)	58s
Semver: ref-slice fork (Windows) (sparse)	53s
All CI stages	1s
Check for semver compliance	0s
Run the release workflow	0s
	47m 42s

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