CommandLineUtils does not allow for rest arguments to equal known arguments

[Alxandr]

The way CommandLineUtils is built today, it does not allow for rest argument to equal any known arguments. This effectively means that any argument that the ApplicationHost knows about, cannot be used by applications running on top of it. For instance, if I create a command line application that uses CommandLineUtils and accepts --version, and then do k run --version, --version is picked up by the ApplicationHost, yet it doesn't display the k --version, nor does it launch my application. It fails with the error message that TODO: Error: unrecognized flag '--version'.

[ChengTian]

dupe of #520