Fleet UI: Clickable elements include cursor hover state

[RachelElysia]

Issue

Cerra #17208

Description

• Find all clickable elements in UI that do not have a hover state and add hoverstate
  • Checkbox hoverstates added: unchecked has outline, checked/indeterminate gets darker, cursor becomes pointer
  • Rows that are clickable should have pointer cursor
  • Dropdowns that are clickable should have pointer cursor

Screenrecording of fixes

https://www.loom.com/share/00e3309b15ab4f7887c5741cbdeaf3ba?sid=610fe6c9-2a4c-4ac0-b2e2-682f47a94786

Checklist for submitter

If some of the following don't apply, delete the relevant line.

• Changes file added for user-visible changes in changes/ or orbit/changes/.
• Manual QA for all new/changed functionality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.68%. Comparing base (29e66ef) to head (033de97).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #17688   +/-   ##
=======================================
  Coverage   65.68%   65.68%           
=======================================
  Files        1193     1193           
  Lines      108028   108028           
  Branches     2574     2574           
=======================================
  Hits        70961    70961           
  Misses      31701    31701           
  Partials     5366     5366           

Flag	Coverage Δ
frontend	51.95% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.