fix(schema): fix schema generation for Deque field

[sergejkozin]

Change Summary

The AssertionError exception occurred on schema generation when a Deque field in the Pydantic model.

from typing import Deque
from pydantic import BaseModel

class Model(BaseModel):
    a: Deque[str]

Model.schema()

"""
Traceback (most recent call last):
  File "/home/sergej/Projects/pydantic/test_deque.py", line 10, in <module>
    Model.schema()
  File "/home/sergej/Projects/pydantic/pydantic/main.py", line 720, in schema
    s = model_schema(cls, by_alias=by_alias, ref_template=ref_template)
  File "/home/sergej/Projects/pydantic/pydantic/schema.py", line 168, in model_schema
    m_schema, m_definitions, nested_models = model_process_schema(
  File "/home/sergej/Projects/pydantic/pydantic/schema.py", line 557, in model_process_schema
    m_schema, m_definitions, nested_models = model_type_schema(
  File "/home/sergej/Projects/pydantic/pydantic/schema.py", line 598, in model_type_schema
    f_schema, f_definitions, f_nested_models = field_schema(
  File "/home/sergej/Projects/pydantic/pydantic/schema.py", line 242, in field_schema
    f_schema, f_definitions, f_nested_models = field_type_schema(
  File "/home/sergej/Projects/pydantic/pydantic/schema.py", line 503, in field_type_schema
    assert field.shape in {SHAPE_SINGLETON, SHAPE_GENERIC}, field.shape
AssertionError: 11
"""

It happened because the SHAPE_DEQUE was missed in the set of array-like shapes.
(https://github.com/samuelcolvin/pydantic/blob/master/pydantic/schema.py#L439)

I updated this set and added the test_deque() case to the test_shema.py.

Related issue number

Fixes #2810

Checklist

• Unit tests for the changes exist
• Tests pass on CI and coverage remains at 100%
• Documentation reflects the changes where applicable
• changes/<pull request or issue id>-<github username>.md file added describing change
  (see changes/README.md for details)
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

[sergejkozin]

please review

[PrettyWood]

Thank you! 🙏