prepare for the modern error handling of Menhir

src/causality.ml

src/clock_calculus.ml

src/compiler_common.ml

src/dune

src/main_lustre_compiler.ml

src/main_lustre_verifier.ml

src/parsers/dune

src/parsers/lexerLustreSpec.mll

src/parsers/lexer_lustre.mll

src/parsers/parse.ml

src/parsers/parser_lustre.messages

src/parsers/parser_lustre.mly

src/utils/location.ml