fix: controller tests fail due to missing CRD path after Helm migration

[STRRL]

Problem

The controller test suite (internal/controller/suite_test.go) fails in CI with:

unable to install CRDs onto control plane: unable to read CRD files:
stat ../../config/crd/bases: no such file or directory

Root Cause

After the migration from kustomize to Helm-based deployment (ceb8595), CRDs are now located under helm/supabase-operator/crds/ instead of config/crd/bases/. The test suite's envtest configuration still references the old path.

Expected Fix

Update the CRD path in internal/controller/suite_test.go to point to the new Helm CRD location.