Test

standard: Fail unserialization when the `C` format is used for classes that are not `Serializable` #2660

Job	Run time
Generate Matrix	9s
Suite / MACOS_ARM64_DEBUG_NTS	18m 29s
Suite / LINUX_X32_DEBUG_ZTS	11m 57s
Suite / ALPINE_X64_ASAN_DEBUG_ZTS	31m 31s
Suite / LINUX_X64_RELEASE_NTS	25m 23s
Suite / LINUX_X64_ASAN_DEBUG_ZTS	43m 54s
Suite / BENCHMARKING	14m 5s
Suite / FREEBSD_NTS	12m 3s
Suite / WINDOWS_X64_ZTS	33m 1s
Suite / OPCACHE_VARIATION	0s
Suite / LIBMYSQLCLIENT	0s
Suite / COVERAGE	0s
Suite / LINUX_PPC64_ASAN_DEBUG_ZTS	0s
Suite / MSAN	0s
Suite / SOLARIS	0s
Suite / PECL	0s
Suite / COMMUNITY_${{ matrix.type }}	0s
	3h 10m 32s

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