NumberInput - rename tokens

[thrbnhrtmnn]

Description / User Story

After changing the structure of the component tokens within #239 , we now need to adjust the token names for the NumberInput.

---

Acceptance Criteria

• Design: All tokens used in the NumberInput are following the new token naming
• Dev: All tokens used in the NumberInput are following the new token naming

---

Background information

• Link to new token naming documentation
• Split form.css into smaller chunks #357 should be done for this component in parallel

[larserbach]

Task: rename "Input" into "InputField"

[thrbnhrtmnn]

Hey @larserbach , do you mean we need a separate task to rename the component TextInput to TextInputField and NumberInput into NumberInputField?

[larserbach]

@thrbnhrtmnn my comment was meant as a reminder for me, what needs to be fixed/renamed in our tokens studio. Not releated to any other ticket.