Tests: Extend RunCMake.CTestCommandLine internal timeout for valgrind
A case added by !3960 (merged) includes a success-case timeout of 2 seconds. That is too short when running under valgrind, so extend it to 5 seconds.
A case added by !3960 (merged) includes a success-case timeout of 2 seconds. That is too short when running under valgrind, so extend it to 5 seconds.