Resolve "Boards > Update column list headers"

What does this MR do and why?

Boards > Updated column list headers

Full description in the MR issue

Figma mockup

Simplified the header of each column (list) header by:

done by me in current MR

• Decrease text size of meta counters for issue and weight.

• Increase chevron size (by using default chevron icons) for more expand/collapse affordance.

• Group controls into a single ellipsis (⋮) dropdown. This also provides a clean place for additional actions and function to be added. (needs clarification) - decided to move to another issue

already done in another issue by someone else

• Remove top border for list based on label. - already done in another issue
• Removing icons from the list name. - already done in another issue
• Remove the list border and the border that separates the list header from the issue cards. - already done in another issue

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

How to set up and validate locally

Numbered steps to set up and validate locally.

1. gdk start
2. login root user
3. url to check: http://gdk.test:3000/groups/yfaietestgroup1/-/boards - no projects http://gdk.test:3000/flightjs/Flight/-/boards - project is existed

Steps.

1. Select any project
2. Click the Issues > Boards button.
3. Check the project issue board

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #323390 (closed)