[C++] Make client conductor idle sleep duration configurable and set … #6616

Job	Run time
C++ Clang 11 debug build	7m 53s
C++ Clang 9 (Ubuntu 20.04)	7m 56s
C++ Clang 10 (Ubuntu 20.04)	8m 4s
C++ Clang 11 (Ubuntu 20.04)	8m 4s
C++ Clang 12 (Ubuntu 20.04)	8m 6s
C++ Clang 13 (Ubuntu 22.04)	8m 12s
C++ Clang 14 (Ubuntu 22.04)	8m 6s
C++ GCC 6 (Ubuntu 20.04)	7m 25s
C++ GCC 11 (Ubuntu 22.04)	7m 12s
C++ GCC 7 (Ubuntu 20.04)	6m 58s
C++ Clang 15 (Ubuntu 22.04)	7m 35s
C++ GCC 12 (Ubuntu 22.04)	8m 51s
C++ Clang 16 (Ubuntu 22.04)	7m 39s
C++ GCC 8 (Ubuntu 20.04)	6m 57s
C++ GCC 13 (Ubuntu 22.04)	7m 35s
C++ GCC 9 (Ubuntu 20.04)	7m 38s
C++ Clang 17 (Ubuntu 22.04)	7m 38s
C++ GCC 10 (Ubuntu 20.04)	7m 16s
C++ CentOS 7 (9)	8m 5s
C++ Rocky 8 (10)	8m 0s
C++ MSVC (Windows)	12m 35s
C++ Xcode (macOS)	19m 53s
Java 8 (ubuntu-22.04)	3m 26s
Java Topology Tests (JDK 8, ubuntu-22.04)	2m 33s
Java 8 (windows-latest)	5m 22s
Java 17 (ubuntu-22.04)	3m 35s
Java 17 (windows-latest)	5m 35s
Java 21 (ubuntu-22.04)	3m 37s
Java 21 (windows-latest)	5m 25s
	3h 37m 11s

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