The current spl-stake-pool crate doesn't always work due to its dependency on spl-math which still uses the v1 Solana crates.
Summary of changes
Since the spl-math dependency wasn't actually needed, it was removed in #7421. So just to get a new patch release out, downgrade the local dependencies.
This will fail CI, but after it lands we can tag the release, and revert this PR.
Problem
The current spl-stake-pool crate doesn't always work due to its dependency on spl-math which still uses the v1 Solana crates.
Summary of changes
Since the spl-math dependency wasn't actually needed, it was removed in #7421. So just to get a new patch release out, downgrade the local dependencies.
This will fail CI, but after it lands we can tag the release, and revert this PR.
cc @billythedummy