Input Field Number - align readonly & disabled state with design

[thrbnhrtmnn]

Description / User story

The readonly state of the Input Field Number should not include the stepper buttons according to design.
We had this status in the past already, but accidentally added the stepper buttons again to the readonly state with #719 .

Also in disabled state the color of the stepper button icons should be grey instead of blue.

Requirements / Prerequisites

• none

Acceptance Criteria

• When in readonly state, the Input Field Number does not display any stepper buttons and the value can not be adjusted.
• When in disabled state, the stepper buttons of the Input Field Number have the same color as defined in design (in all stepper variants) - While fixing this, the stepper buttons should also be checked in other states in dark mode, as they have changed in design and are now #fff
• When in disabled state, the input/value color has the same color as defined in design

Additional information

• ...

Code of Conduct

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