Validate the input Wasm while constructing the ModuleInfo tree in the parse pass #16

Rather than fully parsing the wasm to validate it via wasmparser::Validator::validate_all and then full re-parsing the Wasm again inside the parse pass when constructing the ModuleInfo tree, we should use the lower-level wasmparser::Validator APIs to validate each parsed payload as we get it during the parse pass.

Also we should do the checking for table-manipulation instructions inside this single pass too.