Change names of sizes in react

[Barsnes]

We are moving to xs, sm, md, lg, xl, 2xl names for our sizes. This needs to be updated in code, but still have a grace period for old values for the prop.

Need to investigate if we can mark individual values for the size prop as deprecated.

### Tasks
- [x] Alert
- [x] Button
- [x] Checkbox
- [x] Chips
- [x] Combobox
- [x] DropdownMenu
- [x] Popover
- [x] List
- [x] Spinner
- [x] Search
- [x] Switch
- [x] Table
- [x] Tabs
- [x] Tag
- [x] Textarea
- [x] Textfield
- [x] ToggleGroup
- [x] Heading
- [x] Paragraph
- [x] Label
- [x] ErrorMessage
- [x] Ingress