add(chain): Impl `zcash_protocol::consensus::Parameters` for `Network`

[upbqdn]

Motivation

The new scanning API in zcash_client_backend requires the zcash_protocol::consensus::Parameters trait for the passed network. This is a preparatory PR for the transition to the new API.

PR Author Checklist

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• [x] Will the PR name make sense to users?
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• [ ] Have you added or updated tests?
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Solution

• Use full paths for types from zcash_primitives
• Impl and use conversion between network kinds
• Impl conversions between network upgrades
• Impl zcash_protocol::consensus::Parameters

Reviewer Checklist

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• [ ] Does the PR scope match the ticket?
• [ ] Are there enough tests to make sure it works? Do the tests cover the PR motivation?
• [ ] Are all the PR blockers dealt with? PR blockers can be dealt with in new tickets or PRs.

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