ensure that we have an import_std configuration in the test-set #1812

Job	Run time
Generate build matrix for CMake Test Package CI	6s
Apple Clang 15 C++20 fmtlib gsl-lite Debug	1m 0s
Clang-16 (x86-64) C++20 fmtlib gsl-lite Debug	1m 0s
GCC-12 C++20 fmtlib gsl-lite Debug	1s
GCC-14 C++23 fmtlib ms-gsl Release	1s
Clang-17 (x86-64) C++20 std::format gsl-lite Debug	1s
Clang-18 (arm64) C++20 std::format gsl-lite Debug	51s
Clang-18 (x86-64) C++20 std::format gsl-lite Debug	1s
GCC-13 C++20 std::format gsl-lite Debug	1s
GCC-14 C++20 std::format gsl-lite Debug	1s
MSVC 14.4 C++20 std::format gsl-lite Debug	2m 3s
Clang-17 (x86-64) C++20 std::format gsl-lite Debug	1s
Clang-18 (arm64) C++20 std::format gsl-lite Debug	1m 7s
Clang-18 (x86-64) C++20 std::format gsl-lite Debug	1s
Clang-18 (x86-64) C++23 std::format none Debug	1s
	6m 16s

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