Add extra unchecked_disjoint_bitor implementations.

[bjoernager]

Tracking issue: #135758.

This PR adds the unchecked_disjoint_bitor method to additional types:

impl bool { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i8 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i16 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i32 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i64 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl i128 { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; } impl isize { pub const unsafe fn unchecked_disjoint_bitor(self, rhs: Self) -> Self; }

Our disjoint_bitor intrinsic is already implemented for these types. This method specifically is also already present on unsigned, integral types.

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[bjoernager]

@rustbot label +T-libs-api -T-libs

r? libs-api