Cleanup cast_safe<void> specialization (#3861)

* Cleanup cast_safe<void> specialization

Replace explicit specialization of cast_safe<void> with SFINAE.
It's better for SFINAE cases to cover all type-sets rather than mixing SFINAE and explicit specialization.

Extracted from #3674

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Update cast.h

Use detail::none_of<> as suggested

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Update cast.h

Reorder:
If TEMP_REF
If VOID
if (!VOID && !TEMP_REF)

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