Do not use the user-defined empty set when comparing sets.

[MrAlias]

Fix #7356

[codecov]

Codecov Report

❌ Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 82.5%. Comparing base (01611d3) to head (6b14db0).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
attribute/set.go	85.7%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #7357     +/-   ##
=======================================
- Coverage   82.9%   82.5%   -0.5%     
=======================================
  Files        267     267             
  Lines      24982   25063     +81     
=======================================
- Hits       20729   20690     -39     
- Misses      3877    3956     +79     
- Partials     376     417     +41     

Files with missing lines	Coverage Δ
attribute/set.go	44.9% <85.7%> (-38.3%)	⬇️

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.