remove CVD_TYPEDEF_PTR to clean codes

[rainyl]

Remove all CVD_TYPEDEF_PTR.

this macro is used to define wrappers pointers to use in dart conveniently, ffigen will not generate typedefs not referred so this macro also defined a struct to refer pointers, now all wrapper pointers are referred in *_Close so the macro not needed any more, clean C codes.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.03%. Comparing base (41406a2) to head (9a0132a).

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #89 +/- ## ======================================= Coverage 90.03% 90.03% ======================================= Files 36 36 Lines 5277 5277 ======================================= Hits 4751 4751 Misses 526 526 ```

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