encrypteAesWithVault template func to retrieve and encrypt

    scopes:
    - name: nonprod
      members:
      - dev
      dvars:
      - name: enc_key
        value: my_enc_key
        flags:
        - secret
    tasks:
    - name: task
      task:
      - func: cmd
        dvars:
        - name: value_encrypted
          desc: |
            encrypteAesWithVault will use the encryption key named enc_key stored in vault to encrypt
            it falls back to the normal cached store to get the enc_key if it does not exist
          value: '{{ "ENV_AAA" | encrypteAesWithVault "enc_key" }}'
          flags:
          - vvvv
          - taskScope
        - name: ENV_AAA
          value: '{{.value_encrypted}}'
          flags:
          - secure
        do:
        - name: print
          cmd: |
            var: {{.ENV_AAA}}
            decrypted secure var: {{.secure_ENV_AAA}}
        - name: inspect
          desc: the vars in caller after invoking module task
          cmd:
          - exec_vars
          - exec_base_vars
          - exec_base_env_vars_configured
          - exec_env_vars_configured
          - debug_vars
    

    loading [Config]:  ./tests/functests/upconfig.yml
    Main config:
                 Version -> 1.0.0
                  RefDir -> ./tests/functests
                 WorkDir -> cwd
              AbsWorkDir -> /up_project/up
                TaskFile -> c0202
                 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/c0202
    module: [self], instance id: [dev], exec profile: []
    profile -  envVars:
    
    (*core.Cache)({
    })
    
    Task1: [task ==> task:  ]
    -Step1:
    dvar> value_encrypted:
    "qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk="
    
    -
    qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk=
    self: final context exec vars:
    
    (*core.Cache)({
      "value_encrypted": "qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk=",
      "up_runtime_task_layer_number": 0,
      "ENV_AAA": "qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk="
    })
    
    ~SubStep1: [print:  ]
    var: qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk=
    decrypted secure var: ENV_AAA
    
    ~SubStep2: [inspect: the vars in caller after invoking module task ]
     1: inspect[exec_vars]
    (*core.Cache)({
      "secure_ENV_AAA": "ENV_AAA",
      "value_encrypted": "qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk=",
      "up_runtime_task_layer_number": 0,
      "ENV_AAA": "qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk="
    })
    
     2: inspect[exec_base_vars]
    {
    }
    
     3: inspect[exec_base_env_vars_configured]
     4: inspect[exec_env_vars_configured]
     5: inspect[debug_vars]
    -debug vars-
    "UpRunTimeVars"
    (*core.Cache)({
      "up_runtime_task_layer_number": 0
    })
    
    "RuntimeVarsAndDvarsMerged"
    (*core.Cache)({
    })
    
    "ExecbaseVars"
    (*core.Cache)({
    })
    
    "TaskVars"
    (*core.Cache)({
      "value_encrypted": "qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk="
    })
    
    "ExecContextVars"
    (*core.Cache)({
      "up_runtime_task_layer_number": 0,
      "ENV_AAA": "qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk=",
      "secure_ENV_AAA": "ENV_AAA",
      "value_encrypted": "qOtQF6MM+rZbDl1+VFk7zYjtMkH0veIlMLxnQsTuzdk="
    })
    
    --