remove solana-sdk from solana-system-program

[kevinheavey]

Problem

This crate only needs solana-sdk in dev-dependencies

Summary of Changes

Remove it from normal deps and replace with constituent crates

[mergify]

The Firedancer team maintains a line-for-line reimplementation of the
native programs, and until native programs are moved to BPF, those
implementations must exactly match their Agave counterparts.
If this PR represents a change to a native program implementation (not
tests), please include a reviewer from the Firedancer team. And please
keep refactors to a minimum.

[mergify]

automerge label removed due to a CI failure