finally/resuce support in subtask level

    tasks:
    - name: task
      task:
      - func: block
        loop:
        - item1
        - item2
        desc: task
        do:
        - func: call
          do: sub_task_layer1
    - name: sub_task_layer1
      desc: sub_task_layer1
      task:
      - func: cmd
        do:
        - name: print
          cmd: "in sub_task_layer1"
      - func: call
        loop:
        - aaa
        - bbb
        do:
        - sub_task_layer2
    - name: sub_task_layer2
      task:
      - func: shell
        name: step1
        desc: step 1
        do:
        - 'echo """opening file: {{.loopitem}}"""'
        - echo "hello"|grep "world"
      - func: cmd
        name: step2
        desc: |
          in this case, since there is no ignoreError, the exception was captured by task level finaly code block
          opened file is safely closed
          to make the flow to continue to reach step2, use ignoreError
        do:
        - name: print
          cmd: step 2
      desc: |
        without rescue, the execution will return a non-zero  return code in shell and also report the error
        with rescue, the program will return 0
      rescue: true
      finally:
      - func: shell
        name: close_file
        desc: |
          ensure the opened file is closed
        do:
        - echo "close the file ....."
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> f0186
                 Verbose -> vvv
              ModuleName -> self
               ShellType -> /bin/sh
           MaxCallLayers -> 8
                 Timeout -> 3600000
     MaxModuelCallLayers -> 256
               EntryTask -> task
      ModRepoUsernameRef -> 
      ModRepoPasswordRef -> 
    work dir: /up_project/up
    -exec task: task
    loading [Task]:  ./tests/functests/f0186
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    Task1: [task ==> task:  ]
    -Step1: [: task ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0
    })
    
    -Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 0,
      "loopitem": "item1",
      "loopindex": 0,
      "loopindex1": 1
    })
    
    =Task2: [task ==> sub_task_layer1: sub_task_layer1 ]
    --Step1:
    self: final context exec vars:
    
    (*core.Cache)({
      "loopindex1": 1,
      "up_runtime_task_layer_number": 1,
      "loopitem": "item1",
      "loopindex": 0
    })
    
    ~~SubStep1: [print:  ]
    in sub_task_layer1
    --Step2:
    self: final context exec vars:
    
    (*core.Cache)({
      "loopindex1": 1,
      "up_runtime_task_layer_number": 1,
      "loopitem": "item1",
      "loopindex": 0
    })
    
    ==Task3: [task/sub_task_layer1 ==> sub_task_layer2: without rescue, the execution will return a non-zero  return code in shell and also report the error
    with rescue, the program will return 0
     ]
    ---Step1: [step1: step 1 ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopitem": "aaa",
      "loopindex": 0,
      "loopindex1": 1,
      "up_runtime_task_layer_number": 2
    })
    
    cmd( 1):
    echo """opening file: {{.loopitem}}"""
    
    -
    opening file: aaa
    
    -
     .. ok
    cmd( 2):
    echo "hello"|grep "world"
    
    -
    
    -
     .. failed(suppressed if it is not the last step)
    task Finally:
    ---Step1: [
    close_fileensure the opened file is closed
    ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopindex1": 1,
      "up_runtime_task_layer_number": 2,
      "loopitem": "aaa",
      "loopindex": 0
    })
    
    cmd( 1):
    echo "close the file ....."
    
    -
    close the file .....
    
    -
     .. ok
    . ok
     WARN: [Rescued in task level, but not advised!] - [setting rescue to yes/true to continue is not recommended
    it is advised to locate root cause of the problem, fix it and re-run the task again
    it is the best practice to test the execution in your ci pipeline to eliminate problems rather than dynamically fix using rescue]
    ===Task3: [task/sub_task_layer1/sub_task_layer2 ==> sub_task_layer2: without rescue, the execution will return a non-zero  return code in shell and also report the error
    with rescue, the program will return 0
     ]
    ----Step1: [step1: step 1 ]
    self: final context exec vars:
    
    (*core.Cache)({
      "up_runtime_task_layer_number": 3,
      "loopitem": "bbb",
      "loopindex": 1,
      "loopindex1": 2,
      "last_result": (*utils.ExecResult)({
        Cmd: "echo \"close the file .....\"",
        Code: 0,
        Output: "close the file .....",
        ErrMsg: ""
      })
    })
    
    cmd( 1):
    echo """opening file: {{.loopitem}}"""
    
    -
    opening file: bbb
    
    -
     .. ok
    cmd( 2):
    echo "hello"|grep "world"
    
    -
    
    -
     .. failed(suppressed if it is not the last step)
    task Finally:
    ----Step1: [
    close_fileensure the opened file is closed
    ]
    self: final context exec vars:
    
    (*core.Cache)({
      "loopindex": 1,
      "loopindex1": 2,
      "up_runtime_task_layer_number": 3,
      "loopitem": "bbb"
    })
    
    cmd( 1):
    echo "close the file ....."
    
    -
    close the file .....
    
    -
     .. ok
    . ok
     WARN: [Rescued in task level, but not advised!] - [setting rescue to yes/true to continue is not recommended
    it is advised to locate root cause of the problem, fix it and re-run the task again
    it is the best practice to test the execution in your ci pipeline to eliminate problems rather than dynamically fix using rescue]
     WARN: [Not rescued in task level] - [please assess the panic problem and cause, fix it before re-run the task]
    task finally ->   ERROR: Failed And Not Ignored! [You may want to continue and ignore the error]