[Task] GraphQL filtering of node names using "label selector" syntax

[andrewazores]

          There is another possibility here that I was considering.

Rather than having the names filter be a list of exact string matches that the given node's name must be a member of, this could reuse the LabelSelectorMatcher. I will give a bit more thought to which approach I would prefer we go for here. Regardless, I suggest you take a look at that class and its unit tests and familiarize yourself with it.

Originally posted by @andrewazores in https://github.com/cryostatio/cryostat/pull/1518#discussion_r1226714199