refactor(yaml): refactor directive handler args

[timreichen]

This PR removes the spread args in yamlDirectiveHandler() and tagDirectiveHandler().

[codecov]

Codecov Report

Attention: Patch coverage is 94.44444% with 1 line in your changes missing coverage. Please review.

Project coverage is 94.74%. Comparing base (2a059d9) to head (2fafd1c).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
yaml/_loader_state.ts	94.44%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6589      +/-   ##
==========================================
+ Coverage   94.54%   94.74%   +0.20%     
==========================================
  Files         580      583       +3     
  Lines       43891    46477    +2586     
  Branches     6501     6523      +22     
==========================================
+ Hits        41496    44034    +2538     
- Misses       2352     2400      +48     
  Partials       43       43              

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[kt3k]

I prefer the existing implementation. The validation of arg count and actual handlings are defined in single place with the current code. Now they are spread into 2 places with this change