fix(parser): adjust `AND` and `OR` precedence

[S-YOU]

Following returns true in spanner query.

SELECT TRUE OR FALSE AND FALSE

But current AST returns following

       Expr: &ast.BinaryExpr{
          Op:   "AND",
          Left: &ast.BinaryExpr{
            Op:   "OR",
            Left: &ast.BoolLiteral{
              ValuePos: 7,
              Value:    true,
            },
            Right: &ast.BoolLiteral{
              ValuePos: 15,
              Value:    false,
            },
          },
          Right: &ast.BoolLiteral{
            ValuePos: 25,
            Value:    false,
          },
        },
      },

Which will evaluate to false, which is not correct I think and spec says AND has higher precedence.

https://cloud.google.com/spanner/docs/reference/standard-sql/operators

Order of Precedence	Operator	Input Data Types	Name	Operator Arity
11	AND	BOOL	Logical AND	Binary
12	OR	BOOL	Logical OR	Binary

[makenowjust]

@S-YOU Thank you!