feat: support AWS key manager

[xuan-cu]

Description

Provides keys for service management op-node, op-batcher, and op-proposer using the AWS platform

Rationale

The current key management is written in the configuration file, which is easy to be stolen. In the service management key of the AWS platform, only pods with permissions can obtain the corresponding key.

Example

Add configuration of environment variables

op-node

 env:
   - name: OP_NODE_AWS_P2P_SECRET_NAME
     value: ""
   - name: OP_NODE_AWS_P2P_SECRET_REGION
     value: ""

op-proposer

 env:
    - name: OP_PROPOSER_AWS_SECRET_NAME
     value: ""
   - name: OP_PROPOSER_AWS_SECRET_REGION
     value: ""

op-batcher

 env:
    - name: OP_BATCHER_AWS_SECRET_NAME
     value: ""
    - name: OP_BATCHER_AWS_SECRET_REGION
     value: ""

aws config

 {"pk": "*****"}

Changes

Add op_aws_sdk module to load keys stored in aws platform
Op-node, op-batcher, op-proposer add methods to obtain keys