feat: fixed batch delete happy stack

[naihsuanshao]

CCIE-1748

Summary	Batch Multiple Deletes Using Happy Delete
Type	Task
Status	In Review

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This is for slack request for batch deleting happy stack. See Jira issue here.

Verified the change by cd into examples/typical_app folder then create two test stacks, then run happy delete test-stack1 test-stack-2 to verify that the change works.

The for loop does iterate through all the arguments but one of the test stack deletion got terminated early when it ran into unauthorized error.

Used this launch.json in debugger to step through the code change

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch Package",
            "type": "go",
            "request": "launch",
            "mode": "debug",
            "program": "../happy/cli",
            "args": ["delete", "test-nshao","-v"],
            "cwd": "../happy/examples/typical_app"
        }
    ]
}

[alexlokshin-czi]

Please change to our standard logging. Use of fmt.Print* is frowned upon.

[naihsuanshao]

Updated to using logrus.

[alexlokshin-czi]

Might make sense to message and continue to the next stack.

[naihsuanshao]

Updated to log error and continue.

[jakeyheath]

LGTM TY!