translator: add tls-max-states option
This restricts the time spent in translating sub-formulas for implication tests by limiting the associated automata to 64 states by default. Doing so this does worsen any test case, and actually remove all calls the BuDDy's GC in bdd.test. * spot/twaalgos/translate.cc, spot/twaalgos/translate.hh, spot/tl/simplify.cc, spot/tl/simplify.hh, spot/tl/contain.hh, spot/tl/contain.cc, spot/twaalgos/ltl2tgba_fm.cc, spot/twaalgos/ltl2tgba_fm.hh: Add support for the option or its constraint via an output_aborter. * bin/spot-x.cc, NEWS: Document it. * tests/core/bdd.test: Adjust and augment test case.