does not compile to 32-bit targets since Solana v2.2

[lincot]

Use case: WASM binary that depends on a Solana contract.

cargo build --target wasm32-wasip1

Leads to

error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
   --> invoke/src/instruction_stabilizer.rs:121:32
    |
121 |             accounts: unsafe { core::mem::transmute(accounts) },
    |                                ^^^^^^^^^^^^^^^^^^^^
    |
    = note: source type: `instruction_stabilizer::StableVec<AccountMeta>` (96 bits)
    = note: target type: `solana_program::solana_stable_layout::stable_vec::StableVec<AccountMeta>` (192 bits)

The reason seems to be that solana_stable_layout::stable_vec::StableVec uses u64 instead of usize since 2.2.0.