Create a way to run all the examples in the pipeline

[CaselIT]

There are some examples that are not compatible with 2.0, like nested sets

sqlalchemy/examples/nested_sets/nested_sets.py

Lines 56 to 73 in 8b10829

	lft=case(
	[
	(
	personnel.c.lft > right_most_sibling,
	personnel.c.lft + 2,
	)
	],
	else_=personnel.c.lft,
	),
	rgt=case(
	[
	(
	personnel.c.rgt >= right_most_sibling,
	personnel.c.rgt + 2,
	)
	],
	else_=personnel.c.rgt,
	),

Creating a way of running the tests as part of the pipeline work help avoiding having old examples laying around