Using `petalinux-config` to edit `config` changes are ignored by git

[josephnobes-stfc]

Currently, the config file written to by petalinux-config is created by autoconf from config.in, which is actually part of the repository. This means that if changes are made by running the command, they are not seen by git, and may be lost.

There needs to be a better implementation of this- can petalinux-config operate on config.in instead?

[josephnobes-stfc]

Now that in the 2023 build I've explored including variables from the outside environment (and apparently it's possible to use these in menuconfigs now) it may be possible to make the changes made with the autoconf to the config using these instead; it's a little more flexible and doesn't create the silly issue where the file depends on two incompatible generation systems.