chore(argocd) remove unused projects

[Jcing95]

Summary

Removes the Codesphere-managed ArgoCD AppProject resources (prod and dev) that were applied during oms beta install argocd --deploy-dc-config. These projects are no longer needed.

Changes

• Drop AppProjects from the install flow — ApplyAll no longer calls applyAppProjects; the method and its embedded appProjectsYAML are removed (internal/installer/argocd/argocd_resources.go).
• Delete the manifest — internal/installer/argocd/manifests/app-projects.yaml.
• Remove the now-dead dynClient dependency — argoCDResources only used the dynamic client to apply AppProjects, so it's dropped from the struct, the NewArgoCDResources signature, and both wiring sites in installer.go.
• Remove the dead AppProject GVR mapping and its test case (internal/util/k8s.go, internal/util/k8s_test.go) — nothing produces an AppProject object anymore.
• Update help text — removed the AppProjects (always) line and the AppProjects mention from the --deploy-dc-config flag description (cli/cmd/argocd.go).

Notes

--deploy-dc-config still applies the Helm OCI registry secret, the local cluster secret (with --dc-id), and git repo credentials.

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