Support allocating a tuple of one qubit

[tcNickolas]

Describe the bug

Trying to allocate a tuple of a single qubit variable (a single qubit or one array of qubits) fails with error QS6305 "The shape of the symbol tuple is not compatible with the assigned expression of type Qubit."

It seems fitting to support allocating tuples of single variables, since it would be consistent with Q#' overall approach to tuples.

To Reproduce

using ((q) = (Qubit())) { }

Expected behavior

Successful allocation of the variable.

System information

QDK 0.10.1911.1607

[bettinaheim]

Thanks for filing! I can confirm the bug and will look into it.