Fix `weak_dispatch` and `explicit_conversion_dispatch` in reference-returning overloads #9

Job	Run time
Run BVT with AppleClang / bvt-appleclang	7m 56s
Run BVT with NVHPC / bvt-nvhpc	14m 56s
Run BVT with GCC / bvt-gcc	8m 8s
Run BVT with Intel oneAPI / bvt-oneapi	9m 59s
Run BVT with Clang / bvt-clang	9m 56s
Run BVT with MSVC / bvt-msvc	10m 12s
Build mkdocs / bvt-mkdocs	21s
Run BVT for compatibility / bvt-compatibility (clang, 18, false)	2m 51s
Run BVT for compatibility / bvt-compatibility (clang, 16, false)	2m 53s
Run BVT for compatibility / bvt-compatibility (gcc, 13, false)	1m 26s
Run BVT for compatibility / bvt-compatibility (clang, 17, false)	2m 36s
Run BVT for compatibility / bvt-compatibility (clang, 19, false)	2m 59s
Run BVT for compatibility / bvt-compatibility (gcc, 14, true)	1m 44s
Run BVT for compatibility / bvt-compatibility (clang, 20, true)	3m 2s
Generate report / bvt-report	19s
	1h 19m 18s

Provide feedback