opentelemetry-operator: metrics server binds 0.0.0.0 with no value to override it, so it is unreachable on IPv6 clusters
The opentelemetry-operator chart hardcodes the metrics server bind address to IPv4 (0.0.0.0), making it unreachable on IPv6 or dual-stack clusters. This prevents metrics scraping without any explicit error. The proposed solution is to remove the host from the bind address, allowing Go to default to dual-stack listening.