feat: Add test(should_fail) attribute for tests that are meant to fail

crates/noirc_frontend/src/lexer/token.rs

@@ -325,7 +325,7 @@
     Builtin(String),
     Oracle(String),
     Deprecated(Option<String>),
-    Test(/* should fail: */ bool),
+    Test(/* expect failure: */ bool),
     Custom(String),
 }
 
@@ -507,7 +507,7 @@
             Keyword::Field => write!(f, "Field"),
             Keyword::Fn => write!(f, "fn"),
             Keyword::For => write!(f, "for"),
             Keyword::FormatString => write!(f, "fmtstr"),
             Keyword::Global => write!(f, "global"),
             Keyword::If => write!(f, "if"),
             Keyword::Impl => write!(f, "impl"),
@@ -549,7 +549,7 @@
             "Field" => Keyword::Field,
             "fn" => Keyword::Fn,
             "for" => Keyword::For,
             "fmtstr" => Keyword::FormatString,
             "global" => Keyword::Global,
             "if" => Keyword::If,
             "impl" => Keyword::Impl,