feat(file): update the api

#### file:v1

The following keys were added:
- schemas.GoogleCloudSaasacceleratorManagementProvidersV1NodeSloMetadata.properties.perSliEligibility.$ref (Total Keys: 1)
- schemas.OperationMetadata.properties.apiVersion.readOnly (Total Keys: 1)
- schemas.OperationMetadata.properties.cancelRequested.readOnly (Total Keys: 1)
- schemas.OperationMetadata.properties.createTime.readOnly (Total Keys: 1)
- schemas.OperationMetadata.properties.endTime.readOnly (Total Keys: 1)
- schemas.OperationMetadata.properties.statusDetail.readOnly (Total Keys: 1)
- schemas.OperationMetadata.properties.target.readOnly (Total Keys: 1)
- schemas.OperationMetadata.properties.verb.readOnly (Total Keys: 1)

googleapiclient/discovery_cache/documents/file.v1.json

@@ -672,7 +672,7 @@
       }
     }
   },
-  "revision": "20210629",
+  "revision": "20210708",
   "rootUrl": "https://file.googleapis.com/",
   "schemas": {
     "Backup": {
@@ -1052,6 +1052,10 @@
         "nodeId": {
           "description": "The id of the node. This should be equal to SaasInstanceNode.node_id.",
           "type": "string"
+        },
+        "perSliEligibility": {
+          "$ref": "GoogleCloudSaasacceleratorManagementProvidersV1PerSliSloEligibility",
+          "description": "If present, this will override eligibility for the node coming from instance or exclusions for specified SLIs."
         }
       },
       "type": "object"
@@ -1569,33 +1573,40 @@
       "id": "OperationMetadata",
       "properties": {
         "apiVersion": {
-          "description": "[Output only] API version used to start the operation.",
+          "description": "Output only. API version used to start the operation.",
+          "readOnly": true,
           "type": "string"
         },
         "cancelRequested": {
-          "description": "[Output only] Identifies whether the user has requested cancellation of the operation. Operations that have successfully been cancelled have Operation.error value with a google.rpc.Status.code of 1, corresponding to `Code.CANCELLED`.",
+          "description": "Output only. Identifies whether the user has requested cancellation of the operation. Operations that have successfully been cancelled have Operation.error value with a google.rpc.Status.code of 1, corresponding to `Code.CANCELLED`.",
+          "readOnly": true,
           "type": "boolean"
         },
         "createTime": {
-          "description": "[Output only] The time the operation was created.",
+          "description": "Output only. The time the operation was created.",
           "format": "google-datetime",
+          "readOnly": true,
           "type": "string"
         },
         "endTime": {
-          "description": "[Output only] The time the operation finished running.",
+          "description": "Output only. The time the operation finished running.",
           "format": "google-datetime",
+          "readOnly": true,
           "type": "string"
         },
         "statusDetail": {
-          "description": "[Output only] Human-readable status of the operation, if any.",
+          "description": "Output only. Human-readable status of the operation, if any.",
+          "readOnly": true,
           "type": "string"
         },
         "target": {
-          "description": "[Output only] Server-defined resource path for the target of the operation.",
+          "description": "Output only. Server-defined resource path for the target of the operation.",
+          "readOnly": true,
           "type": "string"
         },
         "verb": {
-          "description": "[Output only] Name of the verb executed by the operation.",
+          "description": "Output only. Name of the verb executed by the operation.",
+          "readOnly": true,
           "type": "string"
         }
       },