fix: unbreak main from alloy 2.0, rand 0.9, and ic-mops 2.x bumps (#579)

## Summary

Three automated dependency bumps merged into `main` over April 2026 left
the build red because the repo's branch protection currently doesn't
gate on CI. This PR addresses all three:

- **`alloy-consensus 2.0.1`** added `block_access_list_hash` (EIP-7928)
and `slot_number` (EIP-7843) to `Header`. Two `Header { ... }` literals
(`evm_rpc_types/src/response/alloy.rs`, `tests/tests.rs`) now list both
as `None` (the upstream EVM-RPC `Block` payload doesn't carry the
Amsterdam data yet).
- **`rand 0.9.4`** changed the `Rng` trait, breaking the one test that
combined `SliceRandom::shuffle` with
`ic_crypto_test_utils_reproducible_rng` (vendored on rand 0.8). Replace
that helper with a seeded `StdRng` and drop the now-unused
dev-dependency.
- **`ic-mops 2.5.1`** ships a packaging bug —
`node_modules/ic-mops/dist/helpers/pocket-ic-client.js` does an ESM
named import from `pic-js-mops`, a CommonJS module, which Node 18 (the
CI runner) rejects with `SyntaxError: Named export 'PocketIc' not
found`. Every Motoko deploy fails at `mops sources`, and the failure
surfaces as the cryptic `Failed while trying to deploy canisters / No
such file or directory` in the `e2e` job. Revert to `^0.27.2` (the
pre-bump version); a deliberate upgrade can be a separate PR.

After this lands, the in-flight pin PR #578 can be rebased and CI should
be fully green.

## Verified locally

`cargo check --workspace --all-targets`, `cargo clippy --tests
--benches`, and the full `scripts/e2e` flow (`dfx canister create --all`
→ 4 rust deploys → `e2e_rust`/`e2e_motoko` deploys + calls) all succeed
on Node 18.19.1.

Author: gregorydemay

Cargo.lock

@@ -58,7 +58,6 @@ candid_parser = { workspace = true }
 evm_rpc_client = { path = "evm_rpc_client", features = ["alloy"] }
 ic-canister-runtime = { workspace = true, features = ["wallet"] }
 ic-pocket-canister-runtime = { workspace = true }
-ic-crypto-test-utils-reproducible-rng = { git = "https://github.com/dfinity/ic", rev = "release-2026-04-16_04-20-base" }
 ic-error-types = { workspace = true }
 ic-metrics-assert = { workspace = true }
 ic-test-utilities-load-wasm = { git = "https://github.com/dfinity/ic", rev = "release-2026-04-16_04-20-base" }

Cargo.toml

@@ -79,6 +79,8 @@ impl TryFrom<Block> for alloy_rpc_types::Block {
                     excess_blob_gas: None,
                     parent_beacon_block_root: None,
                     requests_hash: None,
+                    block_access_list_hash: None,
+                    slot_number: None,
                 },
                 total_difficulty: value.total_difficulty.map(U256::from),
                 size: Some(U256::from(value.size)),