New MantaPay Storage Layout and RPC

[stechu]

Description

closes: #603 #566

This PR implements a more optimized MantaPay storage layout from the benchmark result (#616). It contains the following major changes:

• changes the Identity hash function in MantaPay to TwoxConcat
• optimize the ledger RPC implementation by set an optimal parameter and change the pulling algorithm to a greedy algorithm
• update typescript end to end test
• unit test for RPC

Benchmark data: https://docs.google.com/spreadsheets/d/10BA-gE-NPjoNeCpMB_FmpQ7KkZkjfJVJKaVWCbKDqJg/edit#gid=0

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Linked to Github issue with discussion and accepted design OR have an explanation in the PR that describes this work.
• Wrote unit tests.
• Updated relevant documentation in the code.
• Added one line describing your change in <branch>/CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer.
• If runtime changes, need to update the version numbers properly:
  • authoring_version: The version of the authorship interface. An authoring node will not attempt to author blocks unless this is equal to its native runtime.
  • spec_version: The version of the runtime specification. A full node will not attempt to use its native runtime in substitute for the on-chain Wasm runtime unless all of spec_name, spec_version, and authoring_version are the same between Wasm and native.
  • impl_version: The version of the implementation of the specification. Nodes are free to ignore this; it serves only as an indication that the code is different; as long as the other two versions are the same then while the actual code may be different, it is nonetheless required to do the same thing. Non-consensus-breaking optimizations are about the only changes that could be made which would result in only the impl_version changing.
  • transaction_version: The version of the extrinsics interface. This number must be updated in the following circumstances: extrinsic parameters (number, order, or types) have been changed; extrinsics or pallets have been removed; or the pallet order in the construct_runtime! macro or extrinsic order in a pallet has been changed. You can run the metadata_diff.yml workflow for help. If this number is updated, then the spec_version must also be updated
• Verify benchmarks & weights have been updated for any modified runtime logics
• If importing a new pallet, choose a proper module index for it, and allow it in BaseFilter. Ensure every extrinsic works from front-end. If there's corresponding tool, ensure both work for each other.
• If needed, update our Javascript/Typescript APIs. These APIs are officially used by exchanges or community developers.
• If modifying existing runtime storage items, make sure to implement storage migrations for the runtime and test them with try-runtime. This includes migrations inherited from upstream changes, and you can search the diffs for modifications of #[pallet::storage] items to check for any.

[github-actions]

Please signoff on all commits with your name, email and gpg key for the Developer's Certificate of Origin.
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[Kevingislason]

LGTM

[Garandor]

Partial review of non-test code

[Garandor]

just noticed the benchmark results only have 2 datasets. Shouldnt it be 3?

• identityidentity
• twoxidentity
• twoxtwox

[Garandor]

Approved after discussion