Fix removal of function attributes on ARM
We use a 64bit integer to pass the set of attributes that is to be removed, but the called C function expects a 32bit integer. On most platforms this doesn't cause any problems other than being unable to unset some attributes, but on ARM even the lower 32bit aren't handled correctly because the 64bit value is passed in different registers, so the C function actually sees random garbage. So we need to fix the relevant functions to use 32bit integers instead. Additionally we need an implementation that actually accepts 64bit integers because some attributes can only be unset that way. Fixes #32360
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