Add RunOutput to describe cmd

[wdbaruni]

Few other things I had to do for this change to work:

1. had to change RunCommandResult.Error of type error to RunCommandResult.ErrorMsg of type string due to failing to un/marshal error types
2. Reset stdout and stderr files's cursors as we were reading from the end of the files and returning blank output

Sample output not Truncated

→ bacalhau_local docker run ubuntu echo Hello World --wait | xargs bacalhau_local describe
Id: 1b172d6b-b799-4c08-9404-495c87d09bd9
ClientID: 6c873b593515cfe5c6d3a7ccad987b12d2c1b872607c84468cd038bcb5c3cf65
RequesterNodeId: QmXwbRDdRVJEturtw3yTLJXxM6fWiv7tdLAUdEh3cPr6kj
Spec:
    Engine: Docker
    Verifier: Noop
    Docker:
        Image: ubuntu
        Entrypoint Command:
            - echo
            - Hello
            - World
        Submitted Env Variables: []
        CPU Allocated: ""
        Memory Allocated: ""
        Inputs: []
        Outputs: []
        Annotations: []
    Deployment:
        Concurrency: 0
        Confidence: 0
        Assigned Nodes: []
Deal:
    concurrency: 1
    confidence: 0
    minbids: 0
Shards:
    - ShardIndex: 0
      Nodes:
        - Node: QmXP2bRVZxFfz79Qm1MrU2FquvoLYxWX8ALxhW55HiuMR3
          State: Completed
          Status: 'Got results proposal of length: 0'
          Verified: true
          ResultID: QmYnaUZLWmbRTJzpx6kgxoAVT3ZAmhqWY6qWZm33v8PjNm
          RunOutput:
            Stdout: Hello World
            StdoutTruncated: false
            Stderr: ""
            StderrTruncated: false
            ExitCode: 0
            RunnerError: ""
Start Time: 2022-09-21T14:36:44.424138-07:00

Sample Output Truncated:

→ bacalhau_local docker run ubuntu printf 'A%.0s' {1..3000} --wait | xargs bacalhau_local describe
...
...
we are printing the whole input, we should also trim it
...
...
Deal:
    concurrency: 1
    confidence: 0
    minbids: 0
Shards:
    - ShardIndex: 0
      Nodes:
        - Node: QmXpbWMxiHqomdcA54XRf1jGTDpUT4iWCx4g49n6ovX3bF
          State: Completed
          Status: 'Got results proposal of length: 0'
          Verified: true
          ResultID: QmdvoQLuhYTqJtKTicDG3WBPPbWsvd1NwYG3EAi4bAmHAa
          RunOutput:
            Stdout: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
            StdoutTruncated: true
            Stderr: ""
            StderrTruncated: false
            ExitCode: 0
            RunnerError: ""
Start Time: 2022-09-21T14:37:56.772455-07:00

Sample Output with an Error:

→ bacalhau_local docker run ubuntu dummy_command
→ bacalhau_local describe 25fa036c-b706-4a9d-9e32-55aa84f137a8
Id: 25fa036c-b706-4a9d-9e32-55aa84f137a8
ClientID: 6c873b593515cfe5c6d3a7ccad987b12d2c1b872607c84468cd038bcb5c3cf65
RequesterNodeId: QmXwbRDdRVJEturtw3yTLJXxM6fWiv7tdLAUdEh3cPr6kj
Spec:
    Engine: Docker
    Verifier: Noop
    Docker:
        Image: ubuntu
        Entrypoint Command:
            - dummy_command
        Submitted Env Variables: []
        CPU Allocated: ""
        Memory Allocated: ""
        Inputs: []
        Outputs: []
        Annotations: []
    Deployment:
        Concurrency: 0
        Confidence: 0
        Assigned Nodes: []
Deal:
    concurrency: 1
    confidence: 0
    minbids: 0
Shards:
    - ShardIndex: 0
      Nodes:
        - Node: QmXwbRDdRVJEturtw3yTLJXxM6fWiv7tdLAUdEh3cPr6kj
          State: Error
          Status: '[QmXwbRDd] shard: 25fa036c-b706-4a9d-9e32-55aa84f137a8:0 at state: Error error completing job due to Error response from daemon: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "dummy_command": executable file not found in $PATH: unknown'
          Verified: false
          ResultID: ""
          RunOutput:
            Stdout: ""
            StdoutTruncated: false
            Stderr: ""
            StderrTruncated: false
            ExitCode: 0
            RunnerError: 'failed to start container: Error response from daemon: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "dummy_command": executable file not found in $PATH: unknown'
Start Time: 2022-09-21T14:39:39.231356-07:00

[wdbaruni]

@aronchick I am still questioning the benefit of RunnerError as we are catching all errors and publishing them under Status field as well.

[aronchick]

LGTM!