Allow themed to specify token target for inherited, internal CSS props

[jcfranco]

Priority impact

p - low

Summary

Components that inherit internal component props for reused styles (e.g., https://github.com/Esri/calcite-design-system/pull/10532/files), need to define CSS props on a different element (e.g., parent tabs instead of tab-title).

themed should introduce a new prop to target a different element to apply the parent props to.

The current, brittle, work around is to provide internal CSS props as input to themed.

Desired Outcome

A new prop for TestSelectToken to specify a different style target than the component under test.

Resources

No response