Generalization

Changes:

• Adapted plugin to work with CMORized data retrieved from the databrowser
• Input parameters now retrieved from JSON file
• Added regional selection and changed selection of time covering dates
• Adapted test data, production and functional tests
• Added additional logs/output
• Refactored some code to follow DRY and for better readability

@k202187 Could you please have a look?

.gitlab-ci.yml

@@ -35,7 +35,7 @@ cache:
     # configure the freva plugin
     - export EVALUATION_SYSTEM_CONFIG_FILE=$CI_PROJECT_DIR/plugin_env/freva/evaluation_system.conf
     - export EVALUATION_SYSTEM_CONFIG_DIR=$CI_PROJECT_DIR/plugin_env/freva/
-    - wget https://gitlab.dkrz.de/freva/metadata-crawler-source/-/package_files/923/download -O data-crawler
+    - wget https://freva.gitlab-pages.dkrz.de/metadata-crawler-source/binaries/data-crawler -O data-crawler
     - chmod +x data-crawler
 
 func-test: