fix(S3ConfigTrait): Allow proxy field to take false

[provokateurin]

#47984

Summary

Can be false:

server/lib/private/Files/ObjectStore/S3ConnectionTrait.php

Line 40 in 01478f1

$this->proxy = $params['proxy'] ?? false;

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)

[provokateurin]

/backport to stable30

[provokateurin]

/backport to stable29

[provokateurin]

/backport to stable28

[backportbot]

The backport to stable28 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable28
git pull origin stable28

# Create the new backport branch
git checkout -b backport/48016/stable28

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 7c1c02d6

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/48016/stable28

Error: No changes found in backport branch

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[provokateurin]

In stable28 the field is still in S3ConnectionTrait and not strongly typed, so no backport then.