### issue:
According to the issue https://github.com/grafana/loki/issues/9917
Adding Grafana Loki Enterprise to Grafana Apps Enterprise needs access
to the GEL `/config` API path for cluster configuration

if GEL Apps in Grafana doesn't have an access to this path, client won't
be able to see `/Cluster Configuration` and also won't be able to create
a data source in the Apps with the related Grafana Enterprise logs
plugin.

### more information: 

`HOME/Apps/Grfana Enterprise Logs/Cluster Configuration`

```
A note about this cluster configuration page

The parameter values shown below are those returned by http://example.com:30519/config. If you have configured other components in your cluster with different parameter values, those will not be reflected below.

For documentation on the function of each configuration parameter, see [Configuration reference](https://grafana.com/docs/enterprise-logs/latest/config/reference/).
```
<img width="712" alt="Screenshot 1402-04-30 at 03 17 34"
src="https://github.com/grafana/loki/assets/53074289/48170dce-345d-42d8-bbaa-1bdf4d7bd2f3">



This commit will add `/config` to nginx gateway on SSD mode loki helm
chart deployment

---------

Signed-off-by: Michel Hollands <michel.hollands@gmail.com>
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: Michel Hollands <42814411+MichelHollands@users.noreply.github.com>
Co-authored-by: Joao Marcal <jmarcal@redhat.com>
Co-authored-by: Periklis Tsirakidis <periklis@redhat.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Salva Corts <salva.corts@grafana.com>