Fix import/export

lib/gitlab/import_export/import_export.yml

@@ -64,6 +64,7 @@ project_tree:
     - :create_access_levels
   - :project_feature
   - :custom_attributes
+  - :prometheus_metrics
   - :project_badges
   - :ci_cd_settings
 
@@ -108,6 +109,9 @@ excluded_attributes:
     - :remote_mirror_available_overridden
     - :description_html
     - :repository_languages
+  prometheus_metrics:
+    - :common
+    - :identifier
   snippets:
     - :expired_at
   merge_request_diff:

spec/lib/gitlab/import_export/all_models.yml

@@ -288,6 +288,7 @@ project:
 - fork_network_member
 - fork_network
 - custom_attributes
+- prometheus_metrics
 - lfs_file_locks
 - project_badges
 - source_of_merge_requests
@@ -303,6 +304,8 @@ award_emoji:
 - user
 priorities:
 - label
+prometheus_metrics:
+- project
 timelogs:
 - issue
 - merge_request