Lifecycle state per service

[MBadea17]

Add a lifecycle policy to each service: active, retired, deprecated. Similar to the dataNFT lifecycle policy.

[MBadea17]

@alexcos20 , please define the policy.

[alexcos20]

We already have nft state, at DDO level (https://docs.oceanprotocol.com/developers/ddo-specification#state)

We need to add a new field for each service in DDO, called "state". When service is accessed, ocean-node (and provider) should check if this field exists and if does, check if access is still permitted.

TO DO:

• update DDO specs
• update ocean-node
• update provider (for backwards compat)