feat(backupdr)!: update the API

BREAKING CHANGE: This release has breaking changes.

#### backupdr:v1

The following keys were deleted:
- schemas.BackupConfigInfo.properties.lastSuccessfulLogBackupConsistencyTime.description
- schemas.BackupConfigInfo.properties.lastSuccessfulLogBackupConsistencyTime.format
- schemas.BackupConfigInfo.properties.lastSuccessfulLogBackupConsistencyTime.readOnly
- schemas.BackupConfigInfo.properties.lastSuccessfulLogBackupConsistencyTime.type

The following keys were changed:
- schemas.BackupPlan.properties.backupRules.description

Author: yoshi-automation

discovery/backupdr-v1.json

@@ -2060,7 +2060,7 @@
       }
     }
   },
-  "revision": "20250711",
+  "revision": "20250720",
   "rootUrl": "https://backupdr.googleapis.com/",
   "schemas": {
     "AbandonBackupRequest": {
@@ -2791,12 +2791,6 @@
           "format": "google-datetime",
           "readOnly": true,
           "type": "string"
-        },
-        "lastSuccessfulLogBackupConsistencyTime": {
-          "description": "Output only. If the last log backup were successful, this field has the consistency date.",
-          "format": "google-datetime",
-          "readOnly": true,
-          "type": "string"
         }
       },
       "type": "object"
@@ -2905,7 +2899,7 @@
       "id": "BackupPlan",
       "properties": {
         "backupRules": {
-          "description": "Required. The backup rules for this `BackupPlan`. There must be at least one `BackupRule` message.",
+          "description": "Optional. The backup rules for this `BackupPlan`. There must be at least one `BackupRule` message if on_demand_retention_limit_days is not set.",
           "items": {
             "$ref": "BackupRule"
           },

src/apis/backupdr/v1.ts

@@ -578,10 +578,6 @@ export namespace backupdr_v1 {
      * Output only. If the last backup were successful, this field has the consistency date.
      */
     lastSuccessfulBackupConsistencyTime?: string | null;
-    /**
-     * Output only. If the last log backup were successful, this field has the consistency date.
-     */
-    lastSuccessfulLogBackupConsistencyTime?: string | null;
   }
   /**
    * BackupDrPlanConfig has additional information about Backup and DR's Plan backup configuration.
@@ -653,7 +649,7 @@ export namespace backupdr_v1 {
    */
   export interface Schema$BackupPlan {
     /**
-     * Required. The backup rules for this `BackupPlan`. There must be at least one `BackupRule` message.
+     * Optional. The backup rules for this `BackupPlan`. There must be at least one `BackupRule` message if on_demand_retention_limit_days is not set.
      */
     backupRules?: Schema$BackupRule[];
     /**