feat: Add 'picker' interface for ion-select component

# Feature Request

**Ionic version:**

[x] **4.x**
[x] **5.x**

**Describe the Feature Request**

It would be helpful if it were possible to use `ion-picker` as an interface for `ion-select`

**Describe Preferred Solution**

You could add a 4th value: (picker) for 'interface' property of ion-select.
`ion-select-option` could work as options for one-column picker.
If the picker options were in the template it would be easier apply Angular and custom pipes. At the same time, we could name the control to include into a form.

**Related Code**

This is an extract from one of my projects, changing the 'interface' property value:
``` html

{{ maint.start | date: 'shortDate' }} {{ maint.start | date: 'shortTime'}} - {{ maint.end | shortTime }}
Other schedule

```
I would like it to look like this

**Additional Context**

I find it hard to imagine how we could pass options for two or more columns, but it would be a great addition too.