fix(client): handle jsonrpc improper redirects

[leafty]

Fixes #2966.

How to reproduce the original issue:

1. Start a session
2. Once the session is starting immediately go back
   
3. On the sessions view, try to delete the session

/deploy

[RenkuBot]

You can access the deployment of this PR at https://renku-ci-ui-3017.dev.renku.ch

[ciyer]

I was not able to provoke the original bug that this fixes, so I cannot verify that the problem existed before and has been fixed by these changes, but the code changes make sense.

[RenkuBot]

Tearing down the temporary RenkuLab deplyoment for this PR.