Log login exception with context "aio-cli-plugin-cloudmanager"

[kwin]

Currently the code in getTokenAndKey silently catches all exceptions and falls back to the context cli.
That makes it close to impossible to debug issues with the context aio-cli-plugin-cloudmanager. Therefore I would suggest the following:

Only fall back to cli if there is no config at all for aio-cli-plugin-cloudmanager and pass the original exception to the caller otherwise.

[RemoLiechti]

We will revisite IMS usage in the plugin pretty soon and take this into account in the same go, thank you.

[RemoLiechti]

tagged: SKYOPS-76944