refactor: consolidate ecstore public facade (#3678)

* refactor: expand ecstore compatibility facade

* test: enforce ecstore api facade imports

* refactor: hide legacy ecstore layout modules

* refactor: hide ecstore facade root modules

fuzz/fuzz_targets/bucket_validation/storage_compat.rs

@@ -12,6 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-pub(crate) use rustfs_ecstore::bucket::utils::{
+pub(crate) use rustfs_ecstore::api::bucket::utils::{
     check_bucket_and_object_names, check_list_objs_args, check_valid_bucket_name_strict, is_meta_bucketname,
 };

fuzz/fuzz_targets/path_containment/storage_compat.rs

@@ -12,6 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-pub(crate) use rustfs_ecstore::bucket::utils::{
+pub(crate) use rustfs_ecstore::api::bucket::utils::{
     check_object_name_for_length_and_slash, has_bad_path_component, is_valid_object_prefix,
 };