[smt2parser] Add support for name resolution

[ma2bd]

Provide a working implementation of name resolution and name normalization for SMT2 files with the following caveats:

• The old syntax for testers is-Foo is not compatible with name resolution. One needs to replace is-Foo into (_ is Foo) first using the given rewriter renaming::TesterModernizer (see unit tests).
• Error handling is not fully satisfying yet: visitor APIs do not use Result yet and will panic! in case of unknown symbol. (However, this only affects people using the new name-resolution callbacks, not the parsing.)
• The LALR parser will attempt to call some of the new callbacks but proper name resolution requires to use SyntaxBuilder first, then visit the concrete syntax again. See the unit test of the utility type renaming::SymbolNormalizer.