[ty] Treat `Callable`s as bound-method descriptors in special cases #55393

Job	Run time
cargo fmt	19s
Determine changes	16s
python package	1m 33s
pre-commit	1m 57s
mkdocs	2m 50s
cargo build (release)	0s
cargo test (linux, release)	7m 53s
cargo clippy	1m 52s
cargo test (windows)	7m 17s
cargo test (linux)	3m 41s
cargo build (msrv)	2m 14s
benchmarks walltime (medium\|multithreaded)	8m 29s
cargo test (wasm)	3m 18s
benchmarks walltime (small\|large)	8m 3s
test scripts	59s
cargo fuzz build	4m 13s
benchmarks instrumented (ty)	9m 49s
cargo shear	27s
ty completion evaluation	1m 31s
formatter instabilities and black similarity	0s
benchmarks instrumented (ruff)	0s
check playground	0s
Fuzz for new ty panics	17m 35s
ecosystem	50s
test ruff-lsp	49s
fuzz parser	0s
	1h 25m 55s

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