Add support for connecting to snowpark container services

[punitchauhan771]

added logic to connect to snowflake database inside snowpark container service,
the logic contains a new flag:

• is_spcs_connection : boolean -> which the user can provide whether they want to connect to their snowflake db inside spcs or not

fixes #100

[timgraham]

Is there a way we could implement this without adding is_spcs_connection to OPTIONS? Currently everything in OPTIONS is passed to snowflake.connect() which results in a warning:

/home/tim/.virtualenvs/django312/lib/python3.12/site-packages/snowflake/connector/__init__.py:55: UserWarning: 'is_spcs_connection' is an unknown connection parameter

For example, can we assume if HOST is provided that it's a spcs connection? Whatever the solution, it should be explained in the README.

[punitchauhan771]

Hi Tim,

I’ve removed the is_spcs_connection and now use os.environ.get('SNOWFLAKE_SERVICE_NAME') to determine whether the connection is for SPCS. Since a service name is required whenever a service is created, we can use this as a flag to check if it’s within SPCS or not. Let me know if this works.

Thanks