Display pods which are deprecated in a gray tone when searching

This is implements the feature request in #2180
Even though black is not strictly speaking black, because it can be defined in the terminal emulator, it still seems to be a valid concern. For example on mac in the terminal running bash with the standard color scheme it's the same color as other text which fails to highlight it.

I suggest `red`or maybe `yellow` if there is a reason not to use red