[analyzer] Structured binding to arrays

Introducing structured binding to data members and more.
To handle binding to arrays, ArrayInitLoopExpr is also
evaluated, which enables the analyzer to store information
in two more cases. These are:
  - when a lambda-expression captures an array by value
  - in the implicit copy/move constructor for a class
    with an array member

Differential Revision: https://reviews.llvm.org/D126613