Fix the naming of the import of sylva-units-operator/pkg/common

vladimir braquetrequested to merge
fix_package_import into main

What it does

Fix the naming of the import of sylva-units-operator/pkg/common

Before it was sylvav1alpha1c, now it is sylvac

There was no need to track the sylva crd api version, hence the modification

Tests

Tests and e2e tests: ✅

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