internal/parser:ast.Object with filepath.Clean

[luoliwoshang]

fix #479

beacause the file in ast.Object use this style /Users/xxx/lvgl/src/core/../lv_conf_internal.h,and in compare's path is this style /Users/xxx/lvgl/src/lv_conf_internal.h.so when check path ,will got error.

• fetch the ast.Object with filepath.Clean

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.35%. Comparing base (cab94cc) to head (8092599).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #481   +/-   ##
=======================================
  Coverage   84.35%   84.35%           
=======================================
  Files          27       27           
  Lines        2723     2723           
=======================================
  Hits         2297     2297           
  Misses        385      385           
  Partials       41       41           

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