align service names in runtime with dir layout

[butonic]

ocis list currently produces

+-----------------------+
|       EXTENSION       |
+-----------------------+
| graph                 |
| graph-explorer        |
| idm                   |
| idp                   |
| nats                  |
| notifications         |
| ocdav                 |
| ocs                   |
| proxy                 |
| settings              |
| storage-appprovider   |
| storage-authbasic     |
| storage-authbearer    |
| storage-authmachine   |
| storage-frontend      |
| storage-gateway       |
| storage-groupprovider |
| storage-metadata      |
| storage-public-link   |
| storage-shares        |
| storage-sharing       |
| storage-userprovider  |
| storage-users         |
| store                 |
| thumbnails            |
| web                   |
| webdav                |
+-----------------------+

but the folders in /extensions are

drwxr-xr-x 10 vscode vscode 4096 Apr 26 08:30 accounts
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 appprovider
drwxr-xr-x  4 vscode vscode 4096 Apr 19 07:58 audit
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 auth-basic
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 auth-bearer
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 auth-machine
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 frontend
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 gateway
drwxr-xr-x  5 vscode vscode 4096 Apr 19 07:58 glauth
drwxr-xr-x  6 vscode vscode 4096 Apr 19 07:58 graph
drwxr-xr-x  6 vscode vscode 4096 Apr 19 07:58 graph-explorer
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 group
drwxr-xr-x  5 vscode vscode 4096 Apr 19 07:58 idm
drwxr-xr-x 11 vscode vscode 4096 Apr 19 07:58 idp
drwxr-xr-x  4 vscode vscode 4096 Apr 19 07:58 nats
drwxr-xr-x  4 vscode vscode 4096 Apr 19 07:58 notifications
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 ocdav
drwxr-xr-x  6 vscode vscode 4096 Apr 19 07:58 ocs
drwxr-xr-x  5 vscode vscode 4096 Apr 19 07:58 proxy
drwxr-xr-x 10 vscode vscode 4096 Apr 26 08:31 settings
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 sharing
drwxr-xr-x  5 vscode vscode 4096 Apr 19 07:58 storage
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 storage-metadata
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 storage-publiclink
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 storage-shares
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 storage-users
drwxr-xr-x  5 vscode vscode 4096 Apr 26 08:31 store
drwxr-xr-x  6 vscode vscode 4096 Apr 26 08:31 thumbnails
drwxr-xr-x  3 vscode vscode 4096 Apr 27 10:50 user
drwxr-xr-x  6 vscode vscode 4096 Apr 19 07:58 web
drwxr-xr-x  6 vscode vscode 4096 Apr 19 07:58 webdav

we should rename the services in ocis/pkg/runtime/service/service.go

[butonic]

cc @mmattel