Fix YamlSymfonyFileLoader if locator uses directory besides getcwd()

[Nevay]

Fixes a minor bug that did not affect our use-case.
We were passing the relative path $resource instead of the absolute path $path that was returned by the locator (in our case always resolved relative to getcwd() -> no impact) to Yaml::parseFile().

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 70.92%. Comparing base (9680835) to head (47a0193).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...SDK/Configuration/Loader/YamlSymfonyFileLoader.php	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1526      +/-   ##
============================================
+ Coverage     70.81%   70.92%   +0.10%     
  Complexity     2765     2765              
============================================
  Files           408      408              
  Lines          8354     8354              
============================================
+ Hits           5916     5925       +9     
+ Misses         2438     2429       -9     

Flag	Coverage Δ
8.1	70.56% <0.00%> (+0.03%)	⬆️
8.2	70.72% <0.00%> (-0.03%)	⬇️
8.3	70.82% <0.00%> (+0.05%)	⬆️
8.4	70.76% <0.00%> (+0.01%)	⬆️

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Files with missing lines	Coverage Δ
...SDK/Configuration/Loader/YamlSymfonyFileLoader.php	0.00% <0.00%> (ø)

... and 5 files with indirect coverage changes

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