cleanup: resolve nlreturn linter issues

nlreturn linter requires a new line before return
and branch statements except when the return is alone
inside a statement group (such as an if statement) to
increase code clarity. This commit addresses such issues.

Updates: #1586

Signed-off-by: Rakshith R <rar@redhat.com>

internal/util/connection.go

@@ -98,6 +98,7 @@ func (cc *ClusterConnection) GetIoctx(pool string) (*rados.IOContext, error) {
 		} else {
 			err = fmt.Errorf("failed to open IOContext for pool %s: %w", pool, err)
 		}
+
 		return nil, err
 	}
 
@@ -137,5 +138,6 @@ func (cc *ClusterConnection) DisableDiscardOnZeroedWriteSame() error {
 	}
 
 	cc.discardOnZeroedWriteSameDisabled = true
+
 	return nil
 }