Missing generated queries for approval_project_rules_* metrics

We add values instead of generated queries for the folwing metrics

 :approval_project_rules_with_target_branch=>0,
 :approval_project_rules_with_more_approvers_than_required=>0,
 :approval_project_rules_with_less_approvers_than_required=>0,
 :approval_project_rules_with_exact_required_approvers=>0}

Example

      "approval_project_rules": "SELECT COUNT(\"approval_project_rules\".\"id\") FROM \"approval_project_rules\"",
      "approval_project_rules_with_target_branch": "SELECT COUNT(\"approval_project_rules_protected_branches\".\"approval_project_rule_id\") FROM \"approval_project_rules_protected_branches\"",
      "approval_project_rules_with_more_approvers_than_required": 350,
      "approval_project_rules_with_less_approvers_than_required": 350,
      "approval_project_rules_with_exact_required_approvers": 350

We should add the generated queries for DWH