EMQX Dashboard e1.8.0-beta.4 Released

What's Changed

• refactor(metrics): add colors by @Kinplemelon in #2896
• refactor(cluster linking): show linking metrics by @Kinplemelon in #2895
• Sync code from refs/heads/dev/1.10.0 to enterprise by @emqx-ci-robot in #2897
• fix(authz): error after failed submission by @Kinplemelon in #2898
• fix(authn): remove keytab_file config item by @ysfscream in #2900
• Sync code from refs/heads/dev/1.10.0 to enterprise by @emqx-ci-robot in #2899
• fix(flow): blob storage read-only display problem by @Kinplemelon in #2901
• fix(msg transform): prop not being cleared by @Kinplemelon in #2904
• fix(listener): add help-text for rate limiter by @ysfscream in #2902
• Sync code from refs/heads/dev/1.10.0 to enterprise by @emqx-ci-robot in #2903

Full Changelog: e1.8.0-beta.3...e1.8.0-beta.4