Add backup_type attribute to backrest metrics

Author: tony-landreth

internal/collector/generated/pgbackrest_metrics.json

@@ -129,7 +129,7 @@
       - metric_name: ccp_backrest_last_info_backrest_repo_version 
         description: pgBackRest version number when this backup was performed
         value_column: last_info_backrest_repo_version
-        attribute_columns: ["repo"]
+        attribute_columns: ["backup_type", "repo"]
         static_attributes:
           server: "localhost:5432"
           stanza: "db"
@@ -143,21 +143,21 @@
       - metric_name: ccp_backrest_last_info_backup_runtime_seconds 
         description: Total runtime in seconds of this backup
         value_column: backup_runtime_seconds
-        attribute_columns: ["repo"]
+        attribute_columns: ["backup_type", "repo"]
         static_attributes:
           server: "localhost:5432"
           stanza: "db"
       - metric_name: ccp_backrest_last_info_repo_backup_size_bytes
         description: Actual size of only this individual backup in the pgbackrest repository
         value_column: repo_backup_size_bytes
-        attribute_columns: ["repo"]
+        attribute_columns: ["backup_type", "repo"]
         static_attributes:
           server: "localhost:5432"
           stanza: "db"
       - metric_name: ccp_backrest_last_info_repo_total_size_bytes
         description: Total size of this backup in the pgbackrest repository, including all required previous backups and WAL
         value_column: repo_total_size_bytes
-        attribute_columns: ["repo"]
+        attribute_columns: ["backup_type", "repo"]
         static_attributes:
           server: "localhost:5432"
           stanza: "db"