EPIC: create admission controller monorepo

[flavio]

This EPIC keeps track of all the issues that are required to make the current kubewarden-controller a monorepo.

Blocking issues

• contribution guidelines:
  • explain the [full ci] or [ci full] trick to trigger the whole CI tests
  • explain the tilt environment (maybe)?
• docs: explain that going forward we have a single version for everything. When we do a patch release, it will be a patch release of the whole stack. This means the appVersion is not going to be stuck at a patch version .0, but it will eventually evolve
• kwctl:
  • update community brew
  • update arch package (Thanks Dominic)
• Downgrade the policy-reporter chart inside of the monorepo to version 3.7.0 deps: bump policies, downgrade policy-reporter #1402
• Move the updatecli that lives inside of kubewarden/charts that bumps helm charts dependencies into the monorepo #1407

High Priority

• hauler: no idea about what we should do. Maybe there's nothing we have to do. Updated signing URIs. We need to move the updatecli pipeline to kubewarden-controller. Move the updatecli that lives inside of kubewarden/charts that bumps helm charts dependencies into the monorepo #1407
• Add note on kubewarden/helm-charts to direct contributors to the monorepo docs: Add notice to point contributors to monorepo helm-charts#913
• automation(kubewarden-controoller): create tag after the PR of the release is merged
• Hauler manifest not updated by release automation #1449
• Rename monorepo
  • Pick name: adm-controller
  • Open PR changing hauler_manifest.yml URIs
  • Consume new repo name in e2e tests
  • Notify consumers
• community repo: update contents, and external pages like openSSF (blocked on repo rename)
• GHA: check fossa, license checks, govulncheck, openssf: do they need to be adapted to the monorepo? (blocked on repo rename)

Medium Priority

• Add automated Rust toolchain update workflow #1479
• audit-scanner folder inside the top-level: get rid of it. Move the contents where appropriate before removing all the useless leftovers
• investigate removal of the config directory. Probably the only relevant stuff is under config/samples; we could move that to example
• makefile: generate json schema also for the other charts. Right now this is done only for the kubewarden-controller chart
• CI: copy the job from sbomscanner that ensures all the generated code is up-to-date
• Move kubewarden/helm-charts workflow that bumps dependencies (policies, policy-reporter, kuberlr) into kubewarden/kubewarden-controller. If not, on each helm-chart copy, we overwrite the bumps. Decide if and when we run the e2e tests; the bump PRs must be tested. Update the updatecli pipeline to look at the new monorepos, not the old archived ones.
• Check and update the contributing guidelines inside the the crates/kwctl, crates/policy-server et al.
• Update GH https://github.com/kubewarden landing page and remove dead links
• Enabling automerge, and approving PRs means that sometimes the PR gets merge without having time for the gating jobs to be calculated and start gating.

Low Priority

• GHA: e2e-go: upload the logs directory as an artifact. Look into sbomscanner, it's probably doing that but we didn't migrate this logic
• attestation pipeline: install crane with our GHA
• Ensure generated docs/crds for kubewarden/docs are submitted automatically
• Add automated spelling check to CI #1480
• Add cross-platform cargo check for kwctl #1478
• Add Cargo.toml version validation for releases #1477
• Add CI step to check kwctl doc build #1476
• Rename CRD and RBAC files to match kubebuilder/controller-gen defaults #1483