Integrate ScriptLink into the Brand Component

[ghost]

Is your feature request related to a problem? Please describe.
ScriptLink component is to be used within the Brand component such that they share the banner with the brand background colour.

Describe the solution you'd like
Add a scriptLink prop and pass in <ScriptLink>{variant}</ScriptLink> as the value.

Describe alternatives you've considered
Render child passed to Brand. In this case the child would be <ScriptLink>{variant}</ScriptLink>

<Brand>
  <ScriptLink>{variant}</ScriptLink>
</Brand>

Testing notes
[Tester to complete]

Dev insight: Will there be any potential regression? etc

• This feature is expected to need manual testing.

Additional context
Add any other context or screenshots about the feature request here.