Fix issues where unencrypted_size was being falsely used for non-encrypted home folders

[juliusknorr]

This fixes issues that occur when encryption is enabled but the encryption of home folders is disabled on object storage.

Before this change the unencrypted_size might have been set but not always updated (e.g. when writing to a file through fopen). This lead to issues later on when trying to download the file but the size returned from the filecache didn't match with what the storage returns.

#34232 didn't help here since the scan command it uses is not available for object storage.

Steps to reproduce

• Enable encryption
• Disable home folder encryption
• Upload a docx file
• Open the docx file in Collabora, change something and save (this uses fopen)

Before:

• The unencrypted_size column wasn't updated and the file was no longer downloadable

After:

• The file is downloadable even if the unencrypted size has a wrong data, since the file isn't encrypted we should just stick to the regular size column
• The unencrypted_size column will be properly updated by the ObjectStoreStorage already, for cases when encryption is enabled the Encryption Wrapper will anyways update the value afterwards

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[juliusknorr]

/backport to stable27

[juliusknorr]

/backport to stable26

[juliusknorr]

/backport to stable25

[juliusknorr]

/backport to stable24

[juliusknorr]

🏓 For reviews ... confirmed to work on the affected instance already

[juliusknorr]

/backport to stable27

[juliusknorr]

/backport to stable26

[juliusknorr]

/backport to stable25

[juliusknorr]

/backport to stable24

[backportbot-nextcloud]

The backport to stable25 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable25
git pull origin stable25

# Create the new backport branch
git checkout -b fix/foo-stable25

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable25

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport

[backportbot-nextcloud]

The backport to stable26 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable26
git pull origin stable26

# Create the new backport branch
git checkout -b fix/foo-stable26

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable26

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport

[backportbot-nextcloud]

The backport to stable27 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable27
git pull origin stable27

# Create the new backport branch
git checkout -b fix/foo-stable27

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable27

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport

[backportbot-nextcloud]

The backport to stable24 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable24
git pull origin stable24

# Create the new backport branch
git checkout -b fix/foo-stable24

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable24

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport