[SwiftSyntax] Use TokenSyntax

Moving to `TokenSyntax` as then we can use dot notation

Author: kimdv

utils/gyb_syntax_support/kinds.py

@@ -59,6 +59,6 @@ def syntax_buildable_default_init_value(child, token):
     if child.is_optional:
         return " = nil"
     elif token and token.text:
-        return " = Tokens.`%s`" % lowercase_first_word(token.name)
+        return " = TokenSyntax.`%s`" % lowercase_first_word(token.name)
     else:
         return ""