[FIX] energy_communities: no group found on installing fresh database

There was a bug when that prevent installing module energy_communities as it assigns group access before they are created.

I modified the manifest to create first the groups and then assign them to the access group. Also, I deleted the module part from calling the external id of group in access.

requested review from @konykon

assigned to @DaniilDigtyar

changed the description

approved this merge request

mentioned in commit 04d87d8f

merged

unassigned @DaniilDigtyar