🐛 Remove json_unquote from the ->> JSON operator

As stated in the SQLite docs, https://www.sqlite.org/json1.html#jptr:~:text=The%20SQLite%20version%20of%20json_extract()%20only%20returns%20JSON

SQLite json_extract differs from the MySQL one, which means an additionnal json_unquote isn't needed.
Because the parser is originally for MySQL, I've modified the yacc file to remove json_unquote

Author: julien040

other/sqlparser/compile.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+# This script compiles the Yacc to sql.go
+set -e
+cd "$(dirname "$0")"
+go run goyacc/goyacc.go -fo sql.go sql.y

other/sqlparser/sql.go

@@ -5628,7 +5628,7 @@ function_call_keyword
   }
 | column_name_or_offset JSON_UNQUOTE_EXTRACT_OP text_literal_or_arg
   {
-    $$ = &JSONUnquoteExpr{JSONValue: &JSONExtractExpr{JSONDoc: $1, PathList: []Expr{$3}}}
+    $$ = &JSONExtractExpr{JSONDoc: $1, PathList: []Expr{$3}}
   }
 
 column_names_opt_paren: