[FSSDK-8978] chore: update openapi schema to 3.1.0 (#392)

* chore: update openapi schema to 3.1.0

* update openapi_spec_validator version

* update open_api_core version

* fix create_spec import failure

* fix python imports in acceptance test

* use updated module

* update acceptance tests

* update test helper method

* Update schema

* Update schema summary

* refactor code

Author: pulak-opti