Ludovico Bianchi

Before merging this, we should remove Python 3.8 from the CI and see if the tests pass without needing to mark them as `xfail`ing.

There might be another test that needs to be skipped/xfailed as it's currently causing a failure in the "user install" integration checks: https://github.com/IDAES/idaes-pse/actions/runs/10424410674/job/28873157657?pr=1401#step:6:538 

> @lbianchi-lbl I think we should look into that one a bit more first, and fix it if we can. Being that is in the core code, we should at...

> The test failures in Python 3.8 are because some element of Numpy or Scipy decided to change the order it reports elements. The set of parallel vectors is the...