[collector] Separate command and args

[TylerHelmuth]

This PR separates the command section into both command and args. When a command.name is provided it will get set, overriding the ENTRYPOINT in the container.

args works with command when it is provided, otherwise they are passed to the entrypoint.

Since our default command name is the same as the default image's ENTRYPOINT, removing it is a non-breaking change.

Related to #1148

[jaronoff97]

@TylerHelmuth is any e2e testing run this for chart? i.e. are we positive data is flowing through the collector if the tests are passing? I didn't see any indication of that from the test logs

[TylerHelmuth]

@jaronoff97 no the ci folder only tests that the chart is installable (the pod starts up). I did test locally (and I shouldve put that in the description)