SQLite reflection doesn't detect DEFERRABLE and INITIALLY options on foreign keys

Describe the bug

SQLite supports foreign keys with the DEFERRABLE and INITIALLY options. Reflection doesn’t detect these however, which causes bogus Alembic changes if these are used.

To Reproduce

from sqlalchemy import create_engine, inspect
conn = create_engine("sqlite:///:memory:").connect()
conn.exec_driver_sql("CREATE TABLE test1 (id INTEGER)")
conn.exec_driver_sql("CREATE TABLE test2 (ref INTEGER, CONSTRAINT ref FOREIGN KEY(ref) REFERENCES test1(id) DEFERRABLE INITIALLY DEFERRED)")
print(inspect(conn).get_foreign_keys("test2"))

Error

[{'name': 'ref', 'constrained_columns': ['ref'], 'referred_schema': None, 'referred_table': 'test1', 'referred_columns': ['id'], 'options': {}}]

options is empty.

Versions

• OS: Linux
• Python: 3.10
• SQLAlchemy: 1.4.44
• Database: SQLite
• DBAPI (eg: psycopg, cx_oracle, mysqlclient): pysqlite

Additional context

No response

[zzzeek]

This looks short (that was fast too thanks) I can just cherry-pick it just as easily, thanks

[mgorven]

we can accept PRs for this. We just merged a similar PR for indexes that use sqlite_where and that was backported to 1.4.x…

#8904 for main. Should I make a separate PR for 1.4?