[tools][cts] Fix unknown test pruning #4237

Job	Run time
Go Build and Test	44s
CMake-windows-latest-Debug-msvc	13m 11s
CMake-windows-latest-Release-msvc	16m 9s
CMake-ubuntu-latest-Debug-gcc	1h 3m 35s
CMake-ubuntu-latest-Release-gcc	1h 7m 45s
CMake-macos-latest-Debug-clang	18m 12s
CMake-macos-latest-Release-clang	22m 35s
CMake-macos-13-Debug-clang	45m 11s
CMake-macos-13-Release-clang	1h 6m 38s
	5h 14m 0s

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