fix(rpc): Fix some RPC response formats to match zcashd

[teor2345]

Motivation

As part of #4130, I discovered some differences between Zebra and zcashd responses.

These are some of the minor ones that were easy to fix.

Specifications

https://zcash.github.io/rpc/getinfo.html
https://zcash.github.io/rpc/getaddressbalance.html
https://zcash.github.io/rpc/getrawmempool.html

Solution

• Make the version number format match zcashd in getinfo
• Remove an extra array wrapper in getaddressbalance
• Return a stable sort order from getrawmempool
  • zcashd seems to return an arbitrary order here, so we might not be able to match it, and we probably shouldn't try

Review

Anyone can review this PR, it's not urgent.

Reviewer Checklist

• Code implements Specs and Designs
• Tests for Expected Behaviour
• Tests for Errors

Follow Up Work

• PR change(rpc): Simplify RPC types and add documentation #4218

[teor2345]

@Mergifyio update

[teor2345]

Some workflows seem to have hung on this PR, perhaps due to the GitHub automatic rebase.

[mergify]

update

✅ Branch has been successfully updated

[teor2345]

@Mergifyio refresh

[teor2345]

Temporary error:

error: failed to solve: failed to fetch oauth token: unexpected status: 401 Unauthorized
Error: buildx failed with: error: failed to solve: failed to fetch oauth token: unexpected status: 401 Unauthorized

[mergify]

refresh

✅ Pull request refreshed