Revert "ostc-ci: Workaround for inter-repo dependency on image builds"

This reverts commit 86a144eb.

As mentioned in the commit this was a temporary workaround until the
needed change could land in the manifest repository. This has happend
now:

https://git.ostc-eu.org/OSTC/OHOS/manifest/-/commit/8d604fb7cd63f6247c3071989005d251f0a068bc



Signed-off-by: Stefan Schmidt <stefan.schmidt@huawei.com>