Update Initiate Negotiation Request - offer field has been deprecated

[hemantxpatel]

Description

• Switch to policy field instead of offer while initiating negotiation and EDR.
• Switch to counterPartyAddress instead of connectorAddress while initiating negotiation, EDR and transfer.

Acceptance Criteria

• Postman Collections should be updated [API, E2E, Seed]
• Tutorials should be updated.

Additional Information

Deprecation Logs:

WARNING The attribute https://w3id.org/edc/v0.0.1/ns/connectorAddress has been deprecated in type https://w3id.org/edc/v0.0.1/ns/ContractRequest, please use https://w3id.org/edc/v0.0.1/ns/counterPartyAddress
WARNING The attribute https://w3id.org/edc/v0.0.1/ns/offer has been deprecated in type https://w3id.org/edc/v0.0.1/ns/ContractRequest, please use https://w3id.org/edc/v0.0.1/ns/policy
WARNING The attribute https://w3id.org/edc/v0.0.1/ns/connectorAddress has been deprecated in type https://w3id.org/edc/v0.0.1/ns/TransferRequest, please use https://w3id.org/edc/v0.0.1/ns/counterPartyAddress