[clang] Hints for `fold_expression_bad_operand` insert parentheses at incorrect ___location

[el-ev]

template<int... args>
int foo() {
    return (args + 1 + ...);
}

Actual behaviour:

The right parenthesis is inserted before 1

/tmp/test.cpp:3:18: error: expression not permitted as operand
      of fold expression
    3 |     return (args + 1 + ...);
      |             ~~~~~^~~
      |             (      )
1 error generated.

-->
return ((args + )1 + ...);

Expected behaviour:

The right parenthesis should be inserted after 1

/tmp/test.cpp:3:18: error: expression not permitted as operand
      of fold expression
    3 |     return (args + 1 + ...);
      |             ~~~~~^~~
      |             (       )
1 error generated.

-->
return ((args + 1) + ...);