refactored the actual allocation support into a struct #78

Job	Run time
CMake: Disable build testing	1m 4s
CMake: Disable example building	30s
Unit: Ubuntu GNU 20 Default	52s
Preset: gcc-debug on ubuntu-latest	28s
Unit: Ubuntu GNU 20 MaxSan	47s
Preset: gcc-release on ubuntu-latest	24s
Unit: Ubuntu GNU 23 Default	47s
Preset: appleclang-debug on macos-latest	23s
Unit: Ubuntu GNU 23 MaxSan	50s
Preset: appleclang-release on macos-latest	23s
Unit: Ubuntu GNU 26 Default	56s
Preset: msvc-debug on windows-latest	29s
Unit: Ubuntu GNU 26 MaxSan	50s
Preset: msvc-release on windows-latest	30s
Unit: Ubuntu LLVM 20 Default	1m 41s
Unit: Ubuntu LLVM 20 MaxSan	1m 6s
Unit: Ubuntu LLVM 23 Default	1m 47s
Compiler: GNU 14	46s
Unit: Ubuntu LLVM 23 MaxSan	1m 1s
Compiler: GNU 13	38s
Unit: Ubuntu LLVM 26 Default	1m 37s
Unit: Ubuntu LLVM 26 MaxSan	1m 2s
Unit: Windows MSVC 20 Default	2m 14s
Compiler: LLVM 20	1m 20s
Unit: Windows MSVC 20 MaxSan	1m 8s
Compiler: LLVM 19	1m 16s
Unit: Windows MSVC 23 Default	2m 14s
Compiler: LLVM 18	1m 12s
Unit: Windows MSVC 23 MaxSan	1m 27s
Unit: Windows MSVC 26 Default	2m 3s
Unit: Windows MSVC 26 MaxSan	1m 30s
Unit: Ubuntu GCC 23 Werror	48s
Unit: Ubuntu GCC 23 Dynamic	50s
create-issue-when-fault	0s
	34m 53s

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