(WIP) Add functionality to print hashes and computed errors in tests

[jmachado-amd]

rocSOLVER's tests currently output no useful information for passing tests, which makes it hard to ascertain when new code adversely affects the accuracy of methods while also hindering the investigation of bugs that may affect determinism.

This PR adds code to print the computed error in each test and hashing functions to allow printing hashes of input and output matrices, when desired.