Load campaign data only once #1580

Job	Run time
Windows (windows-2019, Visual Studio 16 2019, Debug, Win32)	9m 3s
Linux (clang, macos-12, Debug)	1m 37s
Windows (windows-2019, Visual Studio 16 2019, Debug, x64)	10m 17s
Linux (gcc-9, ubuntu-20.04, Debug, 3.16.3, 1.71.0)	1m 36s
Windows (windows-2019, Visual Studio 16 2019, Release, Win32)	18m 34s
Linux (clang-10, ubuntu-20.04, Debug, 3.16.3, 1.71.0, true)	1m 36s
Windows (windows-2019, Visual Studio 16 2019, Release, x64)	19m 58s
Linux (gcc-10, ubuntu-20.04, Debug, true)	1m 39s
Windows (windows-2022, Visual Studio 17 2022, Debug, Win32)	9m 29s
Linux (clang-14, ubuntu-22.04, Debug, 3.22.1, 1.74.0, 17)	1m 37s
Windows (windows-2022, Visual Studio 17 2022, Debug, x64)	9m 45s
Linux (gcc-11, ubuntu-22.04, Debug, 3.22.1, 1.74.0)	1m 19s
Windows (windows-2022, Visual Studio 17 2022, Release, Win32)	18m 18s
Linux (gcc-11, ubuntu-22.04, RelWithDebInfo, 3.22.1, 1.74.0)	1m 37s
Windows (windows-2022, Visual Studio 17 2022, Release, x64)	19m 6s
Linux (gcc-12, ubuntu-22.04, Debug, 1.82.0)	1m 26s
Linux (clang-16, ubuntu-20.04, Debug, true)	1m 36s
	2h 8m 33s

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