FIX contract service list status filter (v18+)

[W1W1-M]

FIX contract service list status filter

In the current implementation of the service list, a $filter variable is used in pair with the $search_status variable in order to filter the results. In some use cases the list isn't properly filtered and the results do not correspond to the filter requested by the user:

• Using the contract services submenu link Expired services gives you expired and not expired services
• Switching between states and then back to running state doesn't filter correctly

Here are the steps to reproduce it :

1. Set up some services in all the different states : inactif, running not expired, running expired and closed.
2. Switch between filter states and observe listed contracts

I can also repeat the problem on develop branch.

Also, try switching between different states and observe that the filter variable in $_POST is not always correctly set.

This PR removes the $filter variable and makes better use of the $search_status variable for list filtering. EN & FR localizations have also been updated for clearer list titles for expired and not expired lists.

The bug is a little subtle but it's there if you look.

This PR is related to issue #26283

This PR is a backport of #26664