Setup scratch fails

[stan-dot]

issue description

1. After updating blueapi from 0.7.0 to 0.7.5
2. go to p38 logs https://k8s-p38-dashboard.diamond.ac.uk/#/log/p38-beamline/p38-blueapi-0/pod?namespace=p38-beamline&container=setup-scratch
3. see that the failing pod complains about:

mkdir -p failed for path /.config/matplotlib: [Errno 13] Permission denied: '/.config'
Matplotlib created a temporary cache directory at /tmp/matplotlib-4een5mgz because there was an issue with the default path (/.config/matplotlib); it is highly recommended to set the MPLCONFIGDIR environment variable to a writable directory, in particular to speed up the import of Matplotlib and to better support multiprocessing.
2025-03-06 13:50:19,674 - Setting up scratch area: /dls_sw/p38/software/blueapi/scratch
Traceback (most recent call last):
  File "/venv/bin/blueapi", line 8, in <module>

logs-from-setup-scratch-in-p38-blueapi-0.log

Acceptance criteria

beamline works again

steps undertaken now

crosscomparing the config with the beamline where blueapi 0.7.5 is deployed - maybe i22?