fix kong configuration for functions service

[SimoneLazzaris]

What kind of change does this PR introduce?

Kong configuration is incorrect: requests to service supabase-functions are routed to functions which doesn't exists

What is the current behavior?

Currently configuration for kong is as follows:

      - name: functions-v1
        _comment: 'Edge Functions: /functions/v1/* -> http://zupa-supabase-functions:9000/*'
        url: http://functions:9000/
        routes:
          - name: functions-v1-all
            strip_path: true
            paths:
              - /functions/v1/

But the functions dns name doesn't exists, and it is hardwired in the code.

What is the new behavior?

Now the configuration is instead using the correct naming used for all other services:

      - name: functions-v1
        _comment: 'Edge Functions: /functions/v1/* -> http://zupa-supabase-functions:9000/*'
        url: http://zupa-supabase-functions:9000/
        routes:
          - name: functions-v1-all
            strip_path: true
            paths:
              - /functions/v1/

Of course, in this example zupa-supabase-functions is the name of the service,

Additional context

$ kubectl get svc -n supa
NAME                      TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
zupa-supabase-analytics   ClusterIP   10.43.231.15    <none>        4000/TCP   4h42m
zupa-supabase-auth        ClusterIP   10.43.125.164   <none>        9999/TCP   97d
zupa-supabase-db          ClusterIP   10.43.226.152   <none>        5432/TCP   97d
zupa-supabase-functions   ClusterIP   10.43.78.210    <none>        9000/TCP   97d
zupa-supabase-imgproxy    ClusterIP   10.43.215.115   <none>        5001/TCP   4h42m
zupa-supabase-kong        ClusterIP   10.43.220.106   <none>        8000/TCP   97d
zupa-supabase-meta        ClusterIP   10.43.144.5     <none>        8080/TCP   97d
zupa-supabase-realtime    ClusterIP   10.43.190.45    <none>        4000/TCP   97d
zupa-supabase-rest        ClusterIP   10.43.59.209    <none>        3000/TCP   97d
zupa-supabase-storage     ClusterIP   10.43.30.150    <none>        5000/TCP   97d
zupa-supabase-studio      ClusterIP   10.43.148.129   <none>        3000/TCP   97d
zupa-supabase-vector      ClusterIP   10.43.198.10    <none>        9001/TCP   4h42m

Notes: replaces PR #75