Replace angle-down with chevron-lg-down

What does this MR do?

This replaces instances of angle-down with chevron-lg-down to update to the chevron naming convention so that angles can be deprecated.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

N/A

Security

N/A

Relates to #222907 (closed)