'variant' has undefined behavior for assignment operator of underlying value

[elBoberido]

Required information

Operating system:
any

Compiler version:
any

Eclipse iceoryx version:
all

Observed result or behaviour:

This leads to undefined behavior since the memory is not initialized with a Foo but the implementation calls the assignment operator of Foo with the uninitialized memory as left hand side.

variant<Foo> f;
f = Foo{};

Expected result or behaviour:

No undefined behavior.

Conditions where it occurred / Performed steps:

code review