eliminate hardcoded openEO Platform and terrascope ToS/PP links

[soxofaan]

These are hardcoded links in capabilities doc:

openeo-python-driver/openeo_driver/views.py

Lines 458 to 465 in 4d9d8b1

	"rel": "terms-of-service",
	"href": "https://openeo.cloud/aup",
	"type": "text/html",
	},
	{
	"rel": "privacy-policy",
	"href": "https://terrascope.be/en/privacy-policy",
	"type": "text/html",

should be moved to deployment-specific configs