Fix CacheUpdate implementations for extra FullEvents #5881

Job	Run time
Build docs	39s
Examples	1m 5s
Test (macOS)	1m 0s
Check minimal versions	32s
MSRV	0s
Test (nightly)	50s
Test (stable)	45s
Test (beta)	41s
Test (Windows)	2m 24s
Test (native-tls)	37s
Test (no default features)	53s
Test (no cache)	2m 6s
Test (no gateway)	1m 31s
Test (unstable Discord API features)	43s
Test (zlib compression)	40s
Test (zstd compression)	40s
Test (zlib and zstd compression)	44s
Test (chrono, chrono)	36s
Test (unstable API + typesize, default unstable typesize, true)	39s
Test (builder without model, builder, true)	19s
Test (unstable Discord API (no default features), unstable, true)	21s
	17m 45s

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