file sesson upload mode are not correctly shown

[FHardow]

Describe the bug
When I upload files with an overwrite mode different then KEEP, then listing the session should also show the same overwrite mode.
The write mode was executed correctly, so there is a problem on how we fetch the write mode from the API.

To Reproduce
Steps to reproduce the behavior:

1. upload files with --write-mode OVERWRITE
2. list file sessions
3. see that the mode is not OVERWRITE but KEEP

Expected behavior
The listing shows the correct write mode so that it doesn't confuse users.

Screenshots

Checklist

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