remove --kubebuilder-project in CLI

[ruanxin]

This command is deprecated, we should do the cleanup in the code base for this command.

AC:

• All code related to --kubebuilder-project should be removed.

[janmedrek]

This should be a part of next major CLI release, we need to synchronize this change with other deprecations and moving alpha commands to non-alpha.

[kyma-bot]

This issue or PR has been automatically marked as stale due to the lack of recent activity.
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/lifecycle stale

[janmedrek]

Stopping the development according to: kyma-project/community#872