[Chips] Add `slot="trailing-icon"`

[asyncLiz]

What is affected?

Component

Description

Add a feature to completely replace or add a trailing icon in multi-action chips. The feature should support adding a decorative or interactive icon/icon button.

Reproduction

N/A

Workaround

N/A

Is this a regression?

No or unsure. This never worked, or I haven't tried before.

Affected versions

N/A

Browser/OS/Node environment

N/A

[kspar]

FYI, the filter-chip-with-dropdown-menu's trailing expand icon cannot be implemented without this feature. Ref #5484.