Deprecate and archive falcosecurity/kilt project

[leogr]

Repository: https://github.com/falcosecurity/kilt

Motivation

The project is no longer a compelling use case since Falco userspace -u instrumentation has been dismissed, and pdig is already archived. Moreover, 2 out of 3 maintainers have been inactive for a long time, and the project is mostly unmaintained.

Core maintainers already agreed on this during the 2023-12-14 maintainers call.

/assign
Closes #305

Tasks

Beta Give feedback

1. docs(README.md): deprecating kilt kilt#89
   approved dco-signoff: yes kind/documentation lgtm size/XS +5
   
2. update(config): archiving kilt test-infra#1322
   approved dco-signoff: yes lgtm size/XS +4
   
3. update(repositories.yaml): archiving kilt #348
   approved dco-signoff: yes kind/cleanup kind/deprecated lgtm size/XS +6