* fix: correct CiliumBGPNodeConfigOverride CRD wait condition and deprecate legacy BGP Peering Policy
- Fix copy-paste bug where cilium_bgp_advertisements was used instead of
cilium_bgp_node_config_overrides when waiting for the
CiliumBGPNodeConfigOverride CRD. This caused the CRD readiness check
to be skipped when only node config overrides were configured.
- Add deprecation notices across docs, sample inventory, and defaults
to guide users away from the legacy v2alpha1 CiliumBGPPeeringPolicy
toward the supported BGP v2 API variables.
* fix(cilium): simplify BGP node override condition
