Conform more closely to OGC Processes API spec

[drewm-swe]

Purpose

• This PR revamps the OGC API Processes API implementation to conform more closely to the specification of OGC API Processes - Part 2: Deploy, Replace, Undeploy. Future work remains to for the implementation to fully conform to the spec. In its current form, the implementation now provides the ability to request execution of an OGC Process with arbitrary parameters that get pass through to the EMS/ADES (Airflow).

Proposed Changes

• [CHANGE] Entire OGC API Processes implementation to leverage the latest schema provided here: https://github.com/drewm-jpl/ogcapi-processes/tree/master/openapi

Issues

• Enable execution of OGC data processing requests with arbitrary parameter values unity-sps#129

Testing

• SPS was successfully deployed with this version of the OGC API server. Following deployment, the cwl_dag process was deployed using the OGC API and executed multiple times with different inputs. The different inputs were reflected in the DAG run that was triggered by the execution. Job status was polled using the job status endpoint. Executions/jobs were also dismissed and dismissed jobs were verified to have been deleted from the list of OGC jobs as well as from the list of DAG runs. The cwl_dag was also successfully undeployed. This process was also performed using the unity-sds-client integration of this client.