Implement custom scripts for ogc-api-records-services

[f-necas]

Custom scripts

This PR adds the capability to run scripts at startup of the container.

It's a part of the georchestra PR :

• Implement custom scripts georchestra#4083

Soving issue :

• Add ability to launch custom scripts before the start of the app georchestra#4030

How-to

Set CUSTOM_SCRIPTS_DIRECTORY environment variable to point to a valid volume.
Set a volume with scripts to execute.

Example :

 ogc-api-records:
    image: georchestra/gn-cloud-ogc-api-records-service:latest
    ...
    volumes:
      - georchestra_datadir:/etc/georchestra
    environment:
      - CUSTOM_SCRIPTS_DIRECTORY=/etc/georchestra/ogc-api/scripts

[edevosc2c]

Ready to be merged

[edevosc2c]

to be backported in https://github.com/georchestra/geonetwork-microservices/tree/geor-main-4.2.5-1?