Make Basic.has behave more like SymPy, use new visitor #409

Job	Run time
build (Debug, yes, 3.11, yes, ubuntu-22.04, gcc)	3m 37s
build (Release, 3.13, yes, gmpxx, no, ubuntu-22.04, gcc)	4m 33s
build (Debug, yes, 3.9, yes, ubuntu-22.04, gcc)	3m 17s
build (Release, 3.13, yes, ubuntu-22.04, gcc)	4m 13s
build (Debug, yes, 3.10, yes, ubuntu-22.04, gcc)	3m 18s
build (Debug, yes, 3.12, yes, ubuntu-22.04, gcc)	3m 22s
build (Release, yes, 3.13, ubuntu-22.04, gcc)	4m 20s
build (Release, 3.13, yes, ubuntu-22.04, gcc)	4m 8s
build (Release, 3.9, yes, flint, yes, ubuntu-22.04, gcc)	4m 31s
build (Debug, 3.12, yes, 18, yes, yes, boostmp, -k "not integer_nthroot", ubuntu-24.04, gcc, llvm...	5m 9s
build (Release, 3.9, yes, ubuntu-22.04, gcc)	4m 6s
build (Release, 3.11, ubuntu-22.04, yes, yes, yes, yes, yes, yes, flint, yes, gcc)	4m 28s
build (Debug, 3.13, no, macos-13, gcc)	5m 53s
build (Release, 3.9, no, macos-13, clang)	6m 4s
build (Debug, 3.13, yes, 5, macos-13, clang)	6m 42s
build (Release, 3.13, macos-13, gcc)	7m 8s
build (Release, 3.13, yes, ubuntu-22.04, clang)	4m 52s
build (Debug, 3.13, yes, yes, ubuntu-22.04, clang)	3m 46s
	1h 23m 27s

Provide feedback