…property file

After the [Community assembly rework, split COG module into "per cloud"
zip packages](2a813fa) commit,
the `cog` maven profile in `src/web/app/pom.xml` is broken:

```
[ERROR] Failed to execute goal on project gs-web-app: Could not resolve
dependencies for project org.geoserver.web:gs-web-app:jar:2.26-SNAPSHOT:
The following artifacts could not be resolved:
org.geoserver.community:gs-cog:jar:2.26-SNAPSHOT (absent):
Could not find artifact org.geoserver.community:gs-cog:jar:2.26-SNAPSHOT
in osgeo-snapshots (https://repo.osgeo.org/repository/snapshot/)
```

Add all the specific cog-xxx jars to the `cog` profile, consistently
with the `cog` profile defined in `src/community/pom.xml`, which
includes all the cog modules.