Add static_multimap_ref::for_each #695

Job	Run time
Doxygen check	18s
Compute matrix	6s
Verify Dev Containers / Verify devcontainers	12s
CUDA12.5 gcc / amd64 / Build gcc13/C++17 / Build gcc13/C++17	3m 2s
CUDA12.5 gcc / amd64 / Build gcc12/C++17 / Build gcc12/C++17	2m 52s
CUDA12.5 gcc / arm64 / Build gcc12/C++17 / Build gcc12/C++17	2m 40s
CUDA11.8 gcc / amd64 / Build gcc11/C++17 / Build gcc11/C++17	2m 28s
Verify Dev Containers / List devcontainers	4s
Verify Dev Containers / cuda12.4-gcc12	1m 10s
Verify Dev Containers / cuda11.8-gcc11	53s
Verify Dev Containers / cuda12.5-gcc12	1m 5s
Verify Dev Containers / cuda12.5-gcc13	1m 38s
Verify Dev Containers / cuda12.5-gcc13	1m 31s
CUDA12.5 gcc / arm64 / Test ${{ inputs.test_name }}	0s
CUDA11.8 gcc / amd64 / Test gcc11/C++17 / Test gcc11/C++17	6m 16s
CUDA12.5 gcc / amd64 / Test gcc12/C++17 / Test gcc12/C++17	6m 31s
CUDA12.5 gcc / amd64 / Test ${{ inputs.test_name }}	0s
CI success	1s
	30m 47s

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