Fix tensorflow-text import to not break core tensorflow functionality (#2448)

* Fix tensorflow-text import to not break core tensorflow functionality

* fix tensorflow and tensorflow_text import handling

* Fix tensorflow-text import to not break core tensorflow functionality

Author: nikolasavic3

keras_hub/src/utils/tensor_utils.py

@@ -12,9 +12,11 @@
 
 try:
     import tensorflow as tf
-    import tensorflow_text as tf_text
 except ImportError:
     tf = None
+try:
+    import tensorflow_text as tf_text
+except ImportError:
     tf_text = None