Update DWH and storage bucket credentials

patch https://api.y42.dev/api/1/github-backend/{org_slug}/{space_slug}/credentials

Following are the requirements for this endpoint:

BigQuery

        {
          "credentials": {
            "auth_provider_x509_cert_url": "string",
            "auth_uri": "string",
            "client_email": "string",
            "client_id": "string",
            "client_x509_cert_url": "string",
            "private_key": "string",
            "private_key_id": "string",
            "project_id": "string",
            "token_uri": "string",
            "type": "string"
          },
          "dwh_type": "bigquery"
        }

Snowflake

        {
          "credentials": {
            "account": "string",
            "database": "string",
            "password": "string",
            "user": "string",
            "warehouse": "string"
          },
          "dwh_type": "snowflake"
        }

Aws S3

        {
          "credentials": {
            "access_key_id": "AKIARERGWEWER55Z",
            "region": "eu-west-2",
            "secret_access_key": "szoVLmNv9iFhzYuhgCwd"
          },
          "dwh_type": "aws_s3"
        }

Azure Blob Storage

        {
          "credentials": {
            "account_key": "string",
            "account_name": "string",
            "container_name": "string"
          },
          "dwh_type": "azure_blob_storage"
        }