[C++] Shorten test timeouts. #8225

Job	Run time
Java Topology Tests (JDK 17, ubuntu-24.04)	2m 54s
Java 17 (ubuntu-24.04)	5m 8s
Java 17 (windows-latest)	9m 25s
C++ Clang 19 debug build	10m 48s
Java 17 (macos-latest)	6m 10s
C++ Clang 9 (Ubuntu 20.04)	11m 56s
Java 21 (ubuntu-24.04)	5m 10s
C++ Clang 10 (Ubuntu 20.04)	11m 30s
Java 21 (windows-latest)	9m 38s
C++ Clang 11 (Ubuntu 20.04)	11m 35s
C++ Clang 13 (Ubuntu 24.04)	12m 25s
Java 21 (macos-latest)	6m 49s
C++ Clang 14 (Ubuntu 24.04)	10m 42s
C++ Clang 12 (Ubuntu 20.04)	11m 49s
Java 23 (ubuntu-24.04)	5m 9s
C++ Clang 15 (Ubuntu 24.04)	10m 40s
Java 23 (windows-latest)	9m 44s
Java 23 (macos-latest)	6m 40s
C++ Clang 16 (Ubuntu 24.04)	10m 47s
C++ GCC 6 (Ubuntu 20.04)	10m 21s
C++ Clang 17 (Ubuntu 24.04)	10m 47s
C++ GCC 7 (Ubuntu 20.04)	10m 10s
C++ GCC 11 (Ubuntu 24.04)	10m 42s
C++ Clang 18 (Ubuntu 24.04)	10m 53s
C++ GCC 8 (Ubuntu 20.04)	10m 7s
C++ GCC 12 (Ubuntu 24.04)	11m 44s
C++ Clang 19 (Ubuntu 24.04)	11m 1s
C++ GCC 9 (Ubuntu 20.04)	10m 59s
C++ Rocky 8 (10)	11m 44s
C++ GCC 13 (Ubuntu 24.04)	11m 17s
C++ GCC 10 (Ubuntu 20.04)	10m 31s
C++ GCC 14 (Ubuntu 24.04)	11m 5s
C++ Xcode (macOS)	12m 13s
C++ MSVC (Windows)	18m 4s
	5h 40m 37s

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