feat: replace the cosmos-db usecases in the tests with core/testing (backport #21525) (#21720)

Co-authored-by: cool-developer <51834436+cool-develope@users.noreply.github.com>
Co-authored-by: Julien Robert <julien@rbrt.fr>

types/query/collections_pagination_test.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"testing"
 
-	db "github.com/cosmos/cosmos-db"
 	"github.com/stretchr/testify/require"
 
 	"cosmossdk.io/collections"
 	"cosmossdk.io/core/store"
+	coretesting "cosmossdk.io/core/testing"
 )
 
 func TestCollectionPagination(t *testing.T) {
@@ -163,7 +163,7 @@ func TestCollectionPagination(t *testing.T) {
 }
 
 type testStore struct {
-	db db.DB
+	db store.KVStoreWithBatch
 }
 
 func (t testStore) OpenKVStore(ctx context.Context) store.KVStore {
@@ -197,6 +197,6 @@ func (t testStore) ReverseIterator(start, end []byte) (store.Iterator, error) {
 var _ store.KVStore = testStore{}
 
 func deps() (store.KVStoreService, context.Context) {
-	kv := db.NewMemDB()
+	kv := coretesting.NewMemDB()
 	return &testStore{kv}, context.Background()
 }

types/query/pagination.go

@@ -4,10 +4,10 @@ import (
 	"fmt"
 	"math"
 
-	db "github.com/cosmos/cosmos-db"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 
+	corestore "cosmossdk.io/core/store"
 	"cosmossdk.io/store/types"
 )
 
@@ -126,7 +126,7 @@ func Paginate(
 	return res, nil
 }
 
-func getIterator(prefixStore types.KVStore, start []byte, reverse bool) db.Iterator {
+func getIterator(prefixStore types.KVStore, start []byte, reverse bool) corestore.Iterator {
 	if reverse {
 		var end []byte
 		if start != nil {