Fix CacheUpdate implementations for extra FullEvents #6099

Job	Run time
Test (nightly)	49s
Examples	1m 3s
Test (macOS)	1m 8s
Test (Windows)	3m 9s
Check minimal versions	28s
Test (stable)	53s
Test (beta)	47s
Test (no gateway)	1m 33s
Test (no default features)	50s
Build docs	35s
Test (no cache)	1m 41s
Test (unstable Discord API features)	56s
Test (unstable API + typesize, default unstable typesize, true)	52s
Test (zlib compression)	51s
Test (native-tls)	1m 0s
Test (chrono, chrono)	1m 2s
Test (zstd compression)	53s
Test (builder without model, builder, true)	33s
Test (zlib and zstd compression)	52s
Test (unstable Discord API (no default features), unstable, true)	34s
MSRV	0s
	20m 29s

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