Rename constants to be more inclusive

What does this MR do and why?

Per https://handbook.gitlab.com/handbook/communication/top-misused-terms/, we should not be using these misused terms. I noticed that a few constants are indeed using them.

There are of course many more occurrences of these terms in our codebase, but constants are the easiest to fix, so I am taking a small step in the right direction through this MR.

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