Add more `select_option_by_*` options to CDP Mode

## Add more `select_option_by_*` options to CDP Mode

There's already:

```python
sb.cdp.select_option_by_text(dropdown_selector, option)
```

I'm going to add:

```python
sb.cdp.select_option_by_index(dropdown_selector, option)

sb.cdp.select_option_by_value(dropdown_selector, option)
```

(Note that regular SeleniumBase already has all three of those methods.)