[ADMINAPI-1270] Add permissions in 6.X DB Dockerfile

[jagudelo-gap]

This pull request updates the Docker configuration for the Admin API service, focusing on improving security, environment flexibility, and feature enablement. The most important changes are grouped below by theme.

Security and Permissions:

• Changed permissions for the PgSql scripts directory from 600 to 700 and set executable permissions for the migration script 3-run-adminapi-migrations.sh in Docker/Settings/V1/DB-Admin/pgsql/Dockerfile. This ensures scripts are executable by the owner, improving compatibility and security.

Configurable Build and Environment:

• Added support for passing the ADMIN_API_VERSION as a build argument in the Docker Compose configuration, allowing easier version management during builds in Docker/V1/Compose/pgsql/compose-build-binaries.yml.

Feature Enablement and Environment Variables:

• Enabled several features by default for the Admin API service, including Docker environment flags, Swagger documentation, and user registration, through new environment variables in the Compose file. This simplifies local development and testing.