ci: make app test more robust #1355

Job	Run time
cxx-std (17, 14, true, false)	1m 6s
gcc-7-8 (8, false, true)	1m 7s
cxx-std (17, 14, false, false)	1m 1s
gcc-7-8 (8, false, false)	56s
cxx-std (20, 14, true, false)	1m 23s
gcc-7-8 (7, false, false)	51s
cxx-std (20, 14, false, false)	1m 0s
gcc-9-10-11 (9, false, true)	57s
cxx-std (23, 14, true, false)	1m 37s
gcc-9-10-11 (9, false, false)	55s
cxx-std (23, 14, false, false)	1m 27s
gcc-9-10-11 (10, false, true)	1m 6s
linux-flang (18, true, true)	1m 16s
gcc-9-10-11 (10, false, false)	55s
linux-flang (18, true, false)	1m 25s
gcc-9-10-11 (11, false, true)	52s
linux-new (12, true, true)	1m 11s
linux-flang (18, false, true)	1m 0s
linux-new (12, true, false)	1m 3s
linux-flang (18, false, false)	1m 2s
gcc-9-10-11 (11, false, false)	45s
linux-new (12, false, true)	1m 6s
gcc-9-10-11 (11, true, true)	50s
linux-new (12, false, false)	1m 3s
mac (clang++, clang, flang-new, true, true)	1m 46s
mac (clang++, clang, flang-new, true, false)	1m 30s
valgrind-memory (true)	2m 6s
linux-new (13, true, true)	1m 4s
mac (clang++, clang, flang-new, false, true)	1m 35s
valgrind-memory (false)	1m 49s
mac (clang++, clang, flang-new, false, false)	1m 29s
linux-new (13, true, false)	53s
mac (g++-14, gcc-14, gfortran-14, true, true)	1m 7s
linux-new (13, false, true)	2m 33s
linux-new (13, false, false)	57s
linux-new (14, true, true)	1m 10s
cmake-older (3.20.6)	1m 16s
linux-new (14, true, false)	55s
linux-new (14, false, true)	58s
linux-new (14, false, false)	50s
clang-tidy (false)	2m 44s
clang-tidy (true)	3m 15s
	53m 51s

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