Propose an optimal and efficient way of updating qt and squish version

[saw-jan]

Current flow:

1. Upload new squish installer to minio cloud. E.g.: squish-8.0.0-qt67x-linux64.run (@DeepDiver1975 knows)

2. Upload the desired Qt and other libraries in the cache (@DeepDiver1975 knows)
   NOTE: cache path is define in client repo's .craft.ini

   • Client version: ownCloudVersion
   • Qt version: QtVersion

   E.g.:
   - https://download.owncloud.com/desktop/craft/cache/{ownCloudVersion}/Qt_{QtVersion}_{CachePatchLvl}/
   - https://download.owncloud.com/desktop/craft/cache/6.0/Qt_6.8.0_0/

   {QtVersion} can be different than the Qt version (next step) required for Squish. But all Qt versions cannot be less than minimum set in CMakeLists.txt

3. Update the Qt version to match with the Squish-Qt in .craft.ini. E.g.: 6.7.3 (MUST match <major>.<minor>)
   NOTE: Do not pin the qt libraries version in .craft.shelf

4. Update the squish version in owncloud-ci/squish/.drone.star. E.g.: 8.0.0-qt67x-linux64

5. Update the squish image tag in owncloud/client/.drone.star. E.g.: owncloudci/squish:fedora-39-8.0.0-qt67x-linux64

6. Done!

How can we improve or ease out this process?

[saw-jan]

If PR owncloud/client#12025 is merged, we do not have to create separate cache path for squish target (Step 2 in current flow)

[saw-jan]

If PR owncloud/client#12025 is merged, we do not have to create separate cache path for squish target (Step 2 in current flow)

now we do not have separate squish target. See owncloud/client#12268