changed name of children route used for default/notfound route

[sksDonni]

Fix apache/skywalking#12007
Properties page not loading up

• Add a unit test to verify that the fix works.

• Explain briefly why the bug exists and how to fix it.
  The issue was caused due to the use of property keyword in the name parameter of route used for not found pages.

• If this is non-trivial feature, paste the links/URLs to the design doc.

• Update the documentation to include this new feature.

• Tests(including UT, IT, E2E) are added to verify the new feature.

• If it's UI related, attach the screenshots below.

Screen.Recording.2024-03-14.at.2.22.12.AM.mov

[sksDonni]

@hanahmily @wu-sheng @sivasathyaseeelan Can you please review the change.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.77%. Comparing base (965ac21) to head (c3149ff).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #411      +/-   ##
==========================================
- Coverage   47.79%   47.77%   -0.02%     
==========================================
  Files         173      173              
  Lines       21562    21562              
==========================================
- Hits        10306    10302       -4     
- Misses      10382    10385       +3     
- Partials      874      875       +1     

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