chore(zone): reduce linux config

[alexandermerritt]

Our current fragment is quite small.

What that means: default-enabled config options in Kconfig that are not explicitly disabled in our fragment, will be enabled once merged with a defconfig for the architecture. Examples include wireless hardware support and networking, bluetooth, sound, etc. which we all do not need for zone kernels.

Goals: reduce the amount of text in the kernel, second to reduce build times.

This is one of many in the future to come; we'll need to is not set any default-enabled configuration options we do not want. For future kernels, we'll need to check for any newly introduce configuration options that are default-enabled and repeat for them.

I'd like to properly generate the fragment rather than have us go with manually editing the config when we want to tweak something.

[alexandermerritt]

Kernel finished building for me on a 32-core EPYC machine with no caching:

________________________________________________________
Executed in  376.62 secs    fish           external
   usr time  101.27 mins  654.00 micros  101.27 mins
   sys time   15.08 mins  489.00 micros   15.08 mins

[alexandermerritt]

I want to try this kernel out with the e2e tests somehow before we merge in.