refactor(yaml): inline readTagProperty()

[timreichen]

Ref: #5749

[codecov]

Codecov Report

Attention: Patch coverage is 34.17722% with 52 lines in your changes missing coverage. Please review.

Project coverage is 96.24%. Comparing base (2e209c0) to head (f2575a1).
Report is 1 commits behind head on main.

Files	Patch %	Lines
yaml/_loader_state.ts	34.17%	50 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5849      +/-   ##
==========================================
- Coverage   96.26%   96.24%   -0.02%     
==========================================
  Files         479      479              
  Lines       38751    38751              
  Branches     5620     5620              
==========================================
- Hits        37302    37296       -6     
- Misses       1406     1412       +6     
  Partials       43       43              

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[iuioiua]

Thank you