Apply workaround for Ubuntu Python 3.12-path-R CI failure

[glatterf42]

This PR tries to implement the workaround identified in actions/runner-images#11137 for the CI failure on Ubuntu 24.04 with Python 3.12.
I'm not sure which part(s) of the suggested workaround are actually required, some seem to evaluate to no-ops (e.g. libssl-dev is already the newest version (3.0.2-0ubuntu1.18).). I'll play around with the steps to see if the workaround can be made more concise.

How to review

• Read the diff and note that the CI checks all pass (in particular the one on ubuntu-latest-py3.12).

PR checklist

• Continuous integration checks all ✅
• Update tests; coverage checks both ✅
• [ ] Add, expand, or update documentation. Just CI.
• [ ] Update release notes. Just CI.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.9%. Comparing base (02dadfa) to head (c5082e0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #553     +/-   ##
=======================================
- Coverage   98.9%   98.9%   -0.1%     
=======================================
  Files         44      44             
  Lines       4790    4790             
=======================================
- Hits        4740    4739      -1     
- Misses        50      51      +1     

see 1 file with indirect coverage changes

[glatterf42]

Funny enough, calling reticulate::py_config() fixes the error on ubuntu, but causes the other OSs to crash. So now we have a step specific to ubuntu-latest-py3.12, which does not even need the IRkernel::installspec() (as do the other ubuntu runs).

Any remaining test error is just flaky.

[measrainsey]

thanks @glatterf42 for the changes and given that the tests are failing because they're flaky, this is good with me