Avoid p2p dependency

[enobayram]

This PR replaces all p2p endpoint requests with service endpoint requests avoiding the need to have a p2p configuration. This simplifies chainweb-data's command line interface, but more importantly, it avoids depending on CW-N's p2p endpoint, which is supposed to be for peer to peer communication only and is subject to backwards-incompatible changes.

In particular, this PR moves the following requests to the service endpoint:

• GET <node-endpoint>/chainweb/0.0/<network-id>/cut
• GET <node-endpoint>/chainweb/0.0/<network-id>/chain/<chain-id>/payload/<block-hash>/outputs

[enobayram]

I have tested this PR by running a chainweb-data instance from it against a mainnet01 and a fast-development node. It works without any issues in server and fill modes.

[enobayram]

In addition to testing this PR on mainnet01 and fast-development, I've also double-checked that the cut and payload/outputs endpoints affected by this PR are unconditionally served on the Service API, see:

• The payload API server is unconditionally a part of service API
• The cut DB is unconditionally provided to the service API and having a cut DB enables the cut API.