Fix gardcode namespace (#15)

* fix hardcode namespace

* test

* fix release version

---------

Co-authored-by: Aleksey Penzin <penzin.a@seletel.ru>

Author: penzinav

charts/gateway-helm/templates/envoy-proxy.yaml

@@ -3,7 +3,7 @@ apiVersion: gateway.envoyproxy.io/v1alpha1
 kind: EnvoyProxy
 metadata:
   name: custom-proxy-config
-  namespace: envoy-gateway-system
+  namespace: '{{ .Release.Namespace }}'
 spec:
   provider:
     type: Kubernetes

charts/gateway-helm/templates/gateway-class.yaml

@@ -9,4 +9,4 @@ spec:
     group: gateway.envoyproxy.io
     kind: EnvoyProxy
     name: custom-proxy-config
-    namespace: envoy-gateway-system
+    namespace: '{{ .Release.Namespace }}'

charts/gateway-helm/templates/gateway.yaml

@@ -3,7 +3,7 @@ apiVersion: gateway.networking.k8s.io/v1
 kind: Gateway
 metadata:
   name: eg-gw
-  namespace: envoy-gateway-system
+  namespace: '{{ .Release.Namespace }}'
 spec:
   gatewayClassName: eg
   listeners: