fix(dropdown): fix the styles for icons with shape caret

[sis0k0]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• If applicable, have a visual design approval

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• clarity.design website / infrastructure changes
• Other... Please describe:

What is the current behavior?

Icons (both clr-icon and cds-icon) with shape caret inside clr-dropdown buttons look different to icons with shape angle. They should look the same because caret is an alias to angle.

Issue Number: #5941

What is the new behavior?

The styles for both shapes are aligned.

Does this PR introduce a breaking change?

• Yes
• No