Test

Fix missing addref for Countable::count() #1209

Job	Run time
Generate Matrix	9s
Suite / FREEBSD_NTS	19m 8s
Suite / ALPINE_X64_ASAN_DEBUG_ZTS	27m 58s
Suite / LINUX_X64_ASAN_DEBUG_ZTS	44m 58s
Suite / LINUX_X32_DEBUG_ZTS	11m 30s
Suite / BENCHMARKING	14m 15s
Suite / LINUX_X64_RELEASE_NTS	21m 24s
Suite / WINDOWS_X64_ZTS	31m 23s
Suite / MACOS_ARM64_DEBUG_NTS	18m 37s
Suite / LIBMYSQLCLIENT	0s
Suite / OPCACHE_VARIATION	0s
Suite / COVERAGE	-1s
Suite / SOLARIS	0s
Suite / LINUX_PPC64_ASAN_DEBUG_ZTS	-1s
Suite / PECL	0s
Suite / COMMUNITY_${{ matrix.type }}	0s
Suite / MSAN	0s
	3h 9m 20s

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