Simulate leader blocks wip

[ryoqun]

Problem

Summary of Changes

Fixes #

[mergify]

If this PR represents a change to the public RPC API:

1. Make sure it includes a complementary update to rpc-client/ (example)
2. Open a follow-up PR to update the JavaScript client @solana/web3.js (example)

Thank you for keeping the RPC clients in sync with the server API @ryoqun.

[joncinque]

This PR contains changes to the solana sdk, which will be moved to a new repo within the next week, when v2.2 is branched from master.

Please merge or close this PR as soon as possible, or re-create the sdk changes when the new repository is ready at https://github.com/anza-xyz/solana-sdk

[github-actions]

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[github-actions]

This pull request was closed because it has been stale for 7 days with no activity.