[WebAssembly] Remove threwValue comparison after __wasm_setjmp_test (#86633) Currently the code thinks a `longjmp` occurred if both `__THREW__` and `__threwValue` are nonzero. But `__threwValue` can be 0, and the `longjmp` library function should change it to 1 in case it is 0: https://en.cppreference.com/w/c/program/longjmp Emscripten libraries were not consistent about that, but after https://github.com/emscripten-core/emscripten/pull/21493 and https://github.com/emscripten-core/emscripten/pull/21502, we correctly pass 1 in case the input is 0. So there will be no case `__threwValue` is 0. And regardless of what `longjmp` library function does, treating `longjmp`'s 0 input to its second argument as "not longjmping" doesn't seem right. I'm not sure where that `__threwValue` checking came from, but probably I was porting then fastcomp's implementation and moved this part just verbatim: https://github.com/emscripten-core/emscripten-fastcomp/blob/9bdc7bb4fc595fe05a021b06fe350e8494a741a1/lib/Target/JSBackend/CallHandlers.h#L274-L278 Just for the context, how this was discovered: https://github.com/emscripten-core/emscripten/pull/21502#pullrequestreview-1942160300
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