Add Aptos ViewRequest support for CRE workflows

[cawthorne]

Summary

• add the Aptos ViewRequest SDK surface used by the CRE Aptos workflows
• keep the change tightly scoped to the Aptos capability client/types needed by the rebased stack
• make the nested Aptos module stable under clean-generate

What changed

• added the Aptos ViewRequest request/response surface used by downstream CRE workflows
• kept the change scoped to the generated/client layer only
• renamed the hand-written Aptos client file so make clean-generate no longer deletes it
• refreshed the nested Aptos module metadata so the rebased branch tests cleanly

Why

The downstream Aptos CRE stack depends on SDK support for Aptos view calls. This PR carries that minimal surface without pulling in unrelated behavior.

Testing

• from capabilities/blockchain/aptos ran:
  • go test ./... -count=1
• from repo root ran:
  • make clean-generate