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dashboards release v4.21.3

Apr 27, 2026 Observability dashboards v4.21.3

Added

Add envoy-vs-nginx-loadtesting and envoy-vs-kong-loadtesting dashboards to public org, split from the former envoy-gateway-loadtesting private dashboard

Fixed

Fix metric comparability in envoy-vs-nginx-loadtesting: align downstream RPS (rate/aggregation), success rate window ([2m]→[5m]), and replace wrong Nginx upstream RPS metric; fix Nginx downstream latency unit (seconds→ms)
Fix metric comparability in envoy-vs-kong-loadtesting: align downstream RPS (rate/aggregation), fix success rate regex to correctly exclude 4xx/5xx codes