Load campaign data only once #1582

Job	Run time
Windows (windows-2019, Visual Studio 16 2019, Debug, Win32)	10m 29s
Linux (clang, macos-12, Debug)	9m 46s
Windows (windows-2019, Visual Studio 16 2019, Debug, x64)	9m 28s
Linux (gcc-9, ubuntu-20.04, Debug, 3.16.3, 1.71.0)	12m 55s
Windows (windows-2019, Visual Studio 16 2019, Release, Win32)	18m 9s
Linux (clang-10, ubuntu-20.04, Debug, 3.16.3, 1.71.0, true)	11m 4s
Windows (windows-2019, Visual Studio 16 2019, Release, x64)	20m 9s
Linux (gcc-10, ubuntu-20.04, Debug, true)	13m 5s
Windows (windows-2022, Visual Studio 17 2022, Debug, Win32)	10m 23s
Linux (clang-14, ubuntu-22.04, Debug, 3.22.1, 1.74.0, 17)	8m 28s
Windows (windows-2022, Visual Studio 17 2022, Debug, x64)	10m 20s
Linux (gcc-11, ubuntu-22.04, Debug, 3.22.1, 1.74.0)	8m 31s
Windows (windows-2022, Visual Studio 17 2022, Release, Win32)	18m 44s
Linux (gcc-11, ubuntu-22.04, RelWithDebInfo, 3.22.1, 1.74.0)	17m 4s
Windows (windows-2022, Visual Studio 17 2022, Release, x64)	19m 30s
Linux (gcc-12, ubuntu-22.04, Debug, 1.82.0)	9m 46s
Linux (clang-16, ubuntu-20.04, Debug, true)	13m 48s
	3h 41m 39s

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