test(bigtable): add IT for fetching a column family #8677

Job	Run time
debug_job	4s
Save PR ref	2s
macOS-Bazel	-1s
Windows-Bazel	-1s
Windows-CMake / cmake + msvc-2022 + x64 + Release + Core4	14m 3s
Windows-CMake / cmake + msvc-2022 + x64 + Release + Core3	9m 48s
macOS-CMake	-1s
Notify-Google-Chat	4s
	23m 58s

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