chore(deps): bump gravity-api-types to aptos-node tip (e9544c8cb3)

[keanji-x]

Summary

Bumps the gravity-api-types (aliased api-types) pin from the stale 1d1153b6fd to e9544c8cb3d8a5757d4c7f1b4807b312c03ba060 — the post-merge tip of aptos-node after Galxe/gravity-aptos#72.

Why this is needed

Follows Galxe/gravity-aptos#72 which introduced Identity::FromGcpSecret and InitialSafetyRulesConfig::FromGcpSecret on the aptos-node branch. Downstream gravity-sdk will bump its gaptos rev to this same aptos-node tip in the companion PR Galxe/gravity-sdk#688.

Without this bump, greth ends up with api-types @ 1d1153b6fd while sdk's gaptos pulls api-types @ e9544c8cb3. Cargo identifies packages by (name, source_url, rev) — two distinct rev SHAs = two distinct packages in the resolved graph. The impl ConfigStorage for PipeExecLayerApi defined in this crate (crates/pipe-exec-layer-ext-v2/execute/src/lib.rs) would then be keyed to greth's copy of the ConfigStorage trait, while sdk's use gaptos::api_types::config_storage::ConfigStorage imports gaptos's copy. Method lookups fail with:

error[E0599]: no method named `fetch_config_bytes` found for struct
              `PipeExecLayerApi<Storage, EthApi>` in the current scope
help: trait `ConfigStorage` which provides `fetch_config_bytes` is implemented
      but not in scope; perhaps you want to import it

What changes in greth

Nothing behaviorally. api-types subcrate contents are byte-identical between 1d1153b6fd and e9544c8cb3 — the three intermediate commits only touch aptos-config/config/ (adds the FromGcpSecret enum variants behind an off-by-default cargo feature gcp-secret-manager). This is pure dep-version alignment.

Test plan

• cargo build -p reth-pipe-exec-layer-ext-v2 locally (verified during pilot, greth-side impls compile unchanged)
• CI green on this PR
• Downstream: gravity-sdk#688 rebuild and cargo check pass after both this and gravity-aptos#72 are merged

Merge ordering

1. feat(config): load identity blob from GCP Secret Manager gravity-aptos#72 ✅ (already merged)
2. This PR (ideally rebase/fast-forward to keep a clean tip SHA for the downstream pin)
3. feat(cluster): support GCP Secret Manager as identity source gravity-sdk#688 (bumps gaptos to e9544c8cb3 and greth to this PR's merge SHA)

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