[stable15] dont try to restore a trashbin item to a readonly target

[backportbot-nextcloud]

backport of #14693

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 17040: failure

ENABLE_REDIS=true, TESTS=integration-ratelimiting

TESTS=acceptance, TESTS-ACCEPTANCE=users

• cancelled - typically means that the tests took longer than the drone CI allows them to run

TESTS=sqlite-php7.0-samba-non-native

Show full log

There was 1 failure:

1) OCA\Files_External\Tests\Storage\SmbTest::testNotifyGetChanges
Actual changes are:
Array
(
    [0] => OC\Files\Notify\Change Object
        (
            [type:OC\Files\Notify\Change:private] => 1
            [path:OC\Files\Notify\Change:private] => newfile.txt
        )

    [1] => OC\Files\Notify\RenameChange Object
        (
            [targetPath:OC\Files\Notify\RenameChange:private] => renamed.txt
            [type:OC\Files\Notify\Change:private] => 4
            [path:OC\Files\Notify\Change:private] => newfile.txt
        )

    [2] => OC\Files\Notify\Change Object
        (
            [type:OC\Files\Notify\Change:private] => 2
            [path:OC\Files\Notify\Change:private] => renamed.txt
        )

)

Failed asserting that an array contains OC\Files\Notify\RenameChange Object &0000000061087c3f000000004573634d (
    'targetPath' => 'renamed.txt'
    'type' => 4
    'path' => 'newfile.txt'
).

/drone/src/github.com/nextcloud/server/apps/files_external/tests/Storage/SmbTest.php:124

TESTS=ui-regression

• I'm a little sad 🤖 and was not able to find the logs for this failed job - please improve me at https://github.com/MorrisJobke/drone-logs to provide this to you

[MorrisJobke]

@icewind1991 I'm confused: the object that is searched is actually in the change list, but somehow the test doesn't find it 🙈