Automated issue generator for failed PyBaMM develop tests

[BradyPlanden]

Feature description

As discussed in #291, add the report-log plugin for pytest with the xarray issue creator.

An example implementation can be found here: https://github.com/keewis/reportlog-test

Motivation

Add an automated issue for failed PyBaMM develop branch tests.

Possible implementation

No response

Additional context

No response

[agriyakhetarpal]

The issue creator is working, though only partially – it can be seen in the PR on my fork above. I have submitted a patch to add the requested feature upstream, we should be good to go after that.