SNOW-581157 okta authenticator

[ppo-38]

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Fixes issue https://github.com/snowflakedb/snowflake-connector-python/issues/1099 SNOW-581157

2. Fill out the following pre-review checklist:

   • [x] I am adding a new automated test(s) to verify correctness of my new code
   • [ ] I am adding new logging messages
   • [ ] I am modifying authorization mechanisms
   • [ ] I am adding new credentials
   • [ ] I am modifying OCSP code
   • [ ] I am adding a new dependency

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