Fix get_results_from_sfqid with DictCursor + multi statements

[sfc-gh-bchinn]

Port PR: https://github.com/snowflakedb/Stored-Proc-Python-Connector/pull/225

I noticed that get_results_from_sfqid assumes that fetchall returns a tuple when that's not necessarily the case. Fixing it here + adding a test that fails without the fix.

E                   AssertionError: assert [{'multiple s...ccessfully.'}] == [{'1': 1}]
E                     At index 0 diff: {'multiple statement execution': 'Multiple statements executed successfully.'} != {'1': 1}
E                     Full diff:
E                     - [{'1': 1}]
E                     + [{'multiple statement execution': 'Multiple statements executed successfully.'}]

[sfc-gh-bchinn]

• Typecheck cursor.py #2550
• SNOW-2333702 Fix types for DictCursor #2532
• Fix get_results_from_sfqid with DictCursor + multi statements #2531 👈 (View in Graphite)
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