* Split ExternalSecretsManagerTest to new ExternalSecretsManagerTest and AWSBasedSecretsManagerTest
* implement SecretsManagerFactory to create GCPSecretsManager
* implement GCPSecretsManager
* implements gcp secret manager.
* Fix it for the GCP's rule.
* create a template of GCP
* fix compile error
* implements to use project_id
* add library for the google cloud secret manager
* add test code for using google credential in the docker container
* modify docker-compose.yml for GCP
* add google_crc32c module
* modify ways to get project id
* create a new docker-compose.yml for Google Cloud
* create a new document
* create compose file for gcp secret manager
* fix invalid styles and formats
* downgrade google library to avoid conflicting protoc versions
