Branches: Branch item update

What does this MR do and why?

Updates branch items.

• Removes icon for branch and commit id
• Changes the pipeline icon size from 24 to 16
• Meta information to be small text and use gray-500
• Moves the compare and delete button to a more action dropdown
• Doesn't render the delete button if user has no permission

Related to Branch list UI improvements (#390925 - closed)

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. http://gdk.test:3000/flightjs/Flight/-/branches/all

Database

SELECT
    "merge_requests".*
FROM
    "merge_requests"
WHERE
    "merge_requests"."source_project_id" = 278964
    AND "merge_requests"."target_branch" = 'master'
    AND "merge_requests"."source_branch" IN ('''test''', '100%branch', '2-mb-file', 'add-balsamiq-file', 'add-ipython-files', 'add-pdf-file', 'add-pdf-text-binary', 'add-sketch', 'add_commit_with_5mb_subject', 'add_images_and_changes', 'after-create-delete-modify-move', 'audio', 'author-committer-different', 'before-create-delete-modify-move', 'big-files', 'binary-encoding', 'blame-on-renamed', 'blob-with-tricky-encoding', 'branch-merged', 'change-to-fork')
ORDER BY
    "merge_requests"."source_branch" ASC,
    "merge_requests"."id" DESC;

https://console.postgres.ai/gitlab/gitlab-production-tunnel-pg12/sessions/18530/commands/61456

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.