Bump google-cloud-translate to 3.16

[kaxil]

The changes added in #44271 require 3.16 as google.cloud.translate_v3.types.automl_translation was added in 3.16 - https://github.com/googleapis/google-cloud-python/blob/main/packages/google-cloud-translate/CHANGELOG.md

Without this it causes failures on main such as https://github.com/apache/airflow/actions/runs/11982463149/job/33410779346?pr=44295#step:7:5367

  ==================================== ERRORS ====================================
  __ ERROR collecting providers/tests/google/cloud/operators/test_translate.py ___
  ImportError while importing test module '/opt/airflow/providers/tests/google/cloud/operators/test_translate.py'.
  Hint: make sure your test modules/packages have valid Python names.
  Traceback:
  /usr/local/lib/python3.11/importlib/__init__.py:126: in import_module
      return _bootstrap._gcd_import(name[level:], package, level)
  providers/tests/google/cloud/operators/test_translate.py:23: in <module>
      from google.cloud.translate_v3.types import automl_translation
  E   ImportError: cannot import name 'automl_translation' from 'google.cloud.translate_v3.types' (/usr/local/lib/python3.11/site-packages/google/cloud/translate_v3/types/__init__.py)
  ----- generated xml file: /files/test_result-providers_google-postgres.xml -----
  =========================== short test summary info ============================
  ERROR providers/tests/google/cloud/operators/test_translate.py
  !!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
  ========================= 1 warning, 1 error in 39.33s =========================
  

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[potiuk]

NICE!.. Our test harness seems to work well :)