chore(python-testing): move memoized tests to unit tests (#15507)

* chore: move memoized test into a separated file

create integration test workflow

* chore: create unit test workflow to run purely pytest

* fix: bad reference

* fix: remove pip requirements bc there aren't any yet

* temp: install unit dependencies directly

* fix: --rootdir=

* fix: try to run only unit test

* chore: decouple memoized as separated module

* fix: bring back dependencies bc superset top-level module is coupled to flask and others so no reason no to do it

* fix: reference

* fix: pre-commit

* fix: pylint

superset/db_engine_specs/base.py

@@ -64,6 +64,7 @@ from superset.sql_parse import ParsedQuery, Table
 from superset.utils import core as utils
 from superset.utils.core import ColumnSpec, GenericDataType
 from superset.utils.hashing import md5_sha_from_str
+from superset.utils.memoized import memoized
 from superset.utils.network import is_hostname_valid, is_port_open
 
 if TYPE_CHECKING:
@@ -1267,7 +1268,7 @@ class BaseEngineSpec:  # pylint: disable=too-many-public-methods
         return parsed_query.is_select()
 
     @classmethod
-    @utils.memoized
+    @memoized
     def get_column_spec(
         cls,
         native_type: Optional[str],