fix(test): enable -Wpedantic

[XuNeo]

Description of the feature or fix

Disabled LV_USE_OBJ_PROPERTY in test, since it relies on converting function pointer and void* which is not ISO C standard.

Fix #5666

Notes

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[lhdjply]

please fix it.

[XuNeo]

Hi @kisvegabor,
The issue mentioned in #5666 can be resolved by this PR. CI has also re-enabled the -Wpedantic to ensure standard C is used.

[kisvegabor]

Okay, I'll close #5698.