Show plus sign when maximum tracking is reached

[britneywwc]

Done

• Blocked by missing attribute from ua-contracts API
• Hardcoded maxTracking value for now to show "+" in front of active machines number

QA

• Check out this feature branch
• Go to /pro/dashboard
• See "+" in front of active machines number

Issue / Card

Fixes WD-10492

Screenshots

[If relevant, please include a screenshot.]

Help

QA steps - Commit guidelines

[webteam-app]

Demo

Jenkins

demos.haus

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.12%. Comparing base (e3eeefa) to head (04519a1).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13810   +/-   ##
=======================================
  Coverage   74.11%   74.12%           
=======================================
  Files         107      107           
  Lines        2863     2864    +1     
  Branches      956      957    +1     
=======================================
+ Hits         2122     2123    +1     
  Misses        715      715           
  Partials       26       26           

Files	Coverage Δ
...scriptionDetails/DetailsContent/DetailsContent.tsx	92.85% <100.00%> (+0.17%)	⬆️
static/js/src/advantage/tests/factories/api.ts	100.00% <ø> (ø)

[abhigyanghosh30]

LGTM