We no longer need to carry a patch and build Solana, and can use
solana-test-validator (with sleepy PoH!) instead. This significantly reduces
build times and will make downstream testing much easier.
Also remove the remnants of do.sh and the old BPF toolchain.
Test Plan: Ran E2E tests.
* Tiltfile: Make the guardian k8s_resource depend on solana-devnet
This makes guardian network convergence faster as the guardian pods
don't have to suffer from increasing redeploy back-off delays. This
should impact performance neglibibly as solana-devnet is still the
heaviest build we perform (at the time of this writing saturating a
32-thread Ryzen 9 CPU on my build machine.)
* hotfix bpf-sdk: bump bpf-sdk; use cargo-build-bpf