duplicate entry in spec.plugins will cause console panic

console will have panic error when duplicate entry is set in spec.plugins

4.13.0-0.nightly-2022-12-19-122634

Always

1. Create console-demo-plugin manifests
$ oc apply -f dynamic-demo-plugin/oc-manifest.yaml 
namespace/console-demo-plugin created
deployment.apps/console-demo-plugin created
service/console-demo-plugin created
consoleplugin.console.openshift.io/console-demo-plugin created 
2.Enable console-demo-plugin
$ oc patch consoles.operator.openshift.io cluster --patch '{ "spec": { "plugins": ["console-demo-plugin"] } }' --type=merge 
console.operator.openshift.io/cluster patched
3. Add a duplicate entry in spec.plugins in consoles.operator/cluster 
$ oc patch consoles.operator.openshift.io cluster --patch '{ "spec": { "plugins": ["console-demo-plugin", "console-demo-plugin"] } }' --type=merge  console.operator.openshift.io/cluster patched
$ oc get consoles.operator cluster -o json | jq .spec.plugins
[
  "console-demo-plugin",
  "console-demo-plugin"
]
4. check console pods status
$ oc get pods -n openshift-console                        
NAME                         READY   STATUS             RESTARTS      AGE
console-6bcc87c7b4-6g2cf     0/1     CrashLoopBackOff   1 (21s ago)   50s
console-6bcc87c7b4-9g6kk     0/1     CrashLoopBackOff   3 (3s ago)    50s
console-7dc78ffd78-sxvcv     1/1     Running            0             2m58s
downloads-758fc74758-9k426   1/1     Running            0             3h18m
downloads-758fc74758-k4q72   1/1     Running            0             3h21m

3. console pods will be in CrashLoopBackOff status
$ oc logs console-6bcc87c7b4-9g6kk -n openshift-console
W1220 06:48:37.279871       1 main.go:228] Flag inactivity-timeout is set to less then 300 seconds and will be ignored!
I1220 06:48:37.279889       1 main.go:238] The following console plugins are enabled:
I1220 06:48:37.279898       1 main.go:240]  - console-demo-plugin
I1220 06:48:37.279911       1 main.go:354] cookies are secure!
I1220 06:48:37.331802       1 server.go:607] The following console endpoints are now proxied to these services:
I1220 06:48:37.331843       1 server.go:610]  - /api/proxy/plugin/console-demo-plugin/thanos-querier/ -> https://thanos-querier.openshift-monitoring.svc.cluster.local:9091
I1220 06:48:37.331884       1 server.go:610]  - /api/proxy/plugin/console-demo-plugin/thanos-querier/ -> https://thanos-querier.openshift-monitoring.svc.cluster.local:9091
panic: http: multiple registrations for /api/proxy/plugin/console-demo-plugin/thanos-querier/goroutine 1 [running]:
net/http.(*ServeMux).Handle(0xc0005b6600, {0xc0005d9a40, 0x35}, {0x35aaf60?, 0xc000735260})
    /usr/lib/golang/src/net/http/server.go:2503 +0x239
github.com/openshift/console/pkg/server.(*Server).HTTPHandler.func1({0xc0005d9940?, 0x35?}, {0x35aaf60, 0xc000735260})
    /go/src/github.com/openshift/console/pkg/server/server.go:245 +0x149
github.com/openshift/console/pkg/server.(*Server).HTTPHandler(0xc000056c00)
    /go/src/github.com/openshift/console/pkg/server/server.go:621 +0x330b
main.main()
    /go/src/github.com/openshift/console/cmd/bridge/main.go:785 +0x5ff5

3. console pods should be running well