Update testing

[Simkern]

• preprocessor pass + macros added for TestExpm
• Test_utils module created for simplified initialization and data handling in tests
• print_mat subroutine added to utils for debugging purposes
• all tests cleaned and test utils deployed.

[loiseaujc]

Everything looks good. Only issue is that you sent a PR to main rather than dev. Let's take the habit of sending PR to dev first and will do the whole PR into main afterward just to keep everything in sync.

[Simkern]

Sure, let's go to dev first, then to main.