Load campaign data only once #1575

Job	Run time
Linux (clang, macos-12, Debug)	4m 32s
Linux (gcc-9, ubuntu-20.04, Debug, 3.16.3, 1.71.0)	4m 30s
Linux (clang-10, ubuntu-20.04, Debug, 3.16.3, 1.71.0, true)	4m 33s
Windows (windows-2019, Visual Studio 16 2019, Debug, Win32)	10m 0s
Linux (gcc-10, ubuntu-20.04, Debug, true)	4m 35s
Linux (clang-14, ubuntu-22.04, Debug, 3.22.1, 1.74.0, 17)	4m 35s
Windows (windows-2019, Visual Studio 16 2019, Debug, x64)	9m 51s
Linux (gcc-11, ubuntu-22.04, Debug, 3.22.1, 1.74.0)	4m 16s
Windows (windows-2019, Visual Studio 16 2019, Release, Win32)	10m 0s
Linux (gcc-11, ubuntu-22.04, RelWithDebInfo, 3.22.1, 1.74.0)	4m 30s
Windows (windows-2019, Visual Studio 16 2019, Release, x64)	10m 11s
Linux (gcc-12, ubuntu-22.04, Debug, 1.82.0)	4m 33s
Windows (windows-2022, Visual Studio 17 2022, Debug, Win32)	9m 51s
Linux (clang-16, ubuntu-20.04, Debug, true)	4m 30s
Windows (windows-2022, Visual Studio 17 2022, Debug, x64)	9m 58s
Windows (windows-2022, Visual Studio 17 2022, Release, Win32)	9m 59s
Windows (windows-2022, Visual Studio 17 2022, Release, x64)	9m 5s
	1h 59m 29s

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