Fix default InModuleScope args-value

[fflaten]

PR Summary

Using ParameterAttribute or CmdLetBinding in InModuleScope scriptblock causes ParameterBindingException for the default when no arguments are provided. $ArgumentList-parameter is default null and is always passed to the scriptblock, which throws the error since advanced functions don't implicitly allow arguments.

PR changes $ArgumentList to be empty array by default as it won't cause the exception when not defined. Similar to #1730 for Mocks.

Fix #1809

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[nohwnd]

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[JustinGrote]

Is this possibly related to #1603?

[fflaten]

No, it won't add any parameters for InModuleScope scriptblock automatically if that's what you mean.

This PR is just a fix to support an advanced functions/script as the InModuleScope scriptblock.