Support CoupledVectorTag to Array Variable

[yjung-anl]

Reason

Currently, CoupledVectorTag in coupleable only supports a standard variable, not an array variable. The array variable support is required to implement a richardson execution in Griffin to the solver based on array variables.

Design

Additionally, defines member functions in coupleable objects such as coupledVectorTagArrayValue to support an array variables.

Impact

CoupledVectorTag in coupleable support an array variables.