Adds container to matrix. #411

Job	Run time
B2 gcc-11	3m 49s
CMake gcc-11 17 Debug	3m 30s
B2 clang-14	3m 43s
B2 msvc-14.2	3m 27s
CMake gcc-11 20 Release	3m 42s
CMake msvc-14.2 Debug C++17	3m 35s
B2 msvc-14.3	3m 32s
CMake clang-11 17 Debug	3m 30s
CMake msvc-14.2 Release C++17	3m 36s
CMake clang-11 20 Debug	3m 30s
CMake msvc-14.3 Debug C++20	3m 33s
CMake clang-13 17 Release	1m 55s
CMake msvc-14.3 Release C++20	3m 36s
CMake clang-13 20 Release	1m 31s
CMake clang-14 17 Debug -stdlib=libc++	3m 42s
CMake clang-14 20 Release -stdlib=libc++	3m 43s
	53m 54s

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