ADL isolation for `__basic_sender` for improved diagnostics #2757

Job	Run time
macos-CPU (MacOS) (clang, Release)	3m 38s
macos-CPU (MacOS) (clang, Debug)	3m 47s
CPU (Windows) (msvc, Debug)	13m 51s
CPU (Windows) (msvc, Release)	15m 29s
CPU (gcc 11, Release)	1m 18s
CPU (gcc 11, Debug)	1m 24s
CPU (clang 16, Release, ASAN)	1m 36s
CPU (gcc 11, Release, ASAN)	1m 27s
CPU (gcc 13, Debug)	1m 15s
CPU (gcc 12, Release, TSAN)	1m 45s
CPU (clang 16, Debug)	1m 24s
CPU (clang 16, Release)	1m 24s
CI (CPU)	2s
CI (CPU) (MacOS)	5s
CI (CPU) (Windows)	10s
	48m 35s

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