Migrate to nextcloud/OCP package in stable25

Signed-off-by: Joas Schilling <coding@schilljs.com>

composer.lock

@@ -4,7 +4,7 @@
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@@ -299,50 +299,6 @@
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@@ -5435,7 +5391,6 @@
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-        "christophwurst/nextcloud": 20,
         "nextcloud/ocp": 20
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