[Mypy] Add public API files (Part 2) to mypy coverage

[sfc-gh-jrose]

This PR includes changes that runs mypy against

• src/snowflake/snowpark/_internal/telemetry.py
• src/snowflake/snowpark/_internal/type_utils.py
• src/snowflake/snowpark/_internal/udf_utils.py
• src/snowflake/snowpark/_internal/utils.py
• src/snowflake/snowpark/async_job.py
• src/snowflake/snowpark/column.py
• src/snowflake/snowpark/context.py
• src/snowflake/snowpark/dataframe_na_functions.py
• src/snowflake/snowpark/dataframe_reader.py
• src/snowflake/snowpark/dataframe_writer.py
• src/snowflake/snowpark/file_operation.py
• src/snowflake/snowpark/files.py
• src/snowflake/snowpark/functions.py

[sfc-gh-stan]

The Local Testing test failures would be fixed by the PR I linked.