[kio] Handle error when getting mount point
The DBus reply is implicitly converted to QString, so when the call fails we get the call error message as string
We then write that into UDS_LOCAL_PATH, which causes issues later on
SENTRY: DOLPHIN-5CT
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The DBus reply is implicitly converted to QString, so when the call fails we get the call error message as string
We then write that into UDS_LOCAL_PATH, which causes issues later on
SENTRY: DOLPHIN-5CT