feat(spanner): update the api

#### spanner:v1

The following keys were added:
- schemas.InstanceConfig.properties.storageLimitPerProcessingUnit (Total Keys: 3)

docs/dyn/spanner_v1.projects.instanceConfigs.html

@@ -150,6 +150,7 @@ <h3>Method Details</h3>
       },
     ],
     &quot;state&quot;: &quot;A String&quot;, # Output only. The current instance config state. Applicable only for USER_MANAGED configs.
+    &quot;storageLimitPerProcessingUnit&quot;: &quot;A String&quot;, # Output only. The storage limit in bytes per processing unit.
   },
   &quot;instanceConfigId&quot;: &quot;A String&quot;, # Required. The ID of the instance config to create. Valid identifiers are of the form `custom-[-a-z0-9]*[a-z0-9]` and must be between 2 and 64 characters in length. The `custom-` prefix is required to avoid name conflicts with Google managed configurations.
   &quot;validateOnly&quot;: True or False, # An option to validate, but not actually execute, a request, and provide the same response.
@@ -247,6 +248,7 @@ <h3>Method Details</h3>
     },
   ],
   &quot;state&quot;: &quot;A String&quot;, # Output only. The current instance config state. Applicable only for USER_MANAGED configs.
+  &quot;storageLimitPerProcessingUnit&quot;: &quot;A String&quot;, # Output only. The storage limit in bytes per processing unit.
 }</pre>
 </div>
 
@@ -297,6 +299,7 @@ <h3>Method Details</h3>
         },
       ],
       &quot;state&quot;: &quot;A String&quot;, # Output only. The current instance config state. Applicable only for USER_MANAGED configs.
+      &quot;storageLimitPerProcessingUnit&quot;: &quot;A String&quot;, # Output only. The storage limit in bytes per processing unit.
     },
   ],
   &quot;nextPageToken&quot;: &quot;A String&quot;, # `next_page_token` can be sent in a subsequent ListInstanceConfigs call to fetch more of the matching instance configurations.
@@ -356,6 +359,7 @@ <h3>Method Details</h3>
       },
     ],
     &quot;state&quot;: &quot;A String&quot;, # Output only. The current instance config state. Applicable only for USER_MANAGED configs.
+    &quot;storageLimitPerProcessingUnit&quot;: &quot;A String&quot;, # Output only. The storage limit in bytes per processing unit.
   },
   &quot;updateMask&quot;: &quot;A String&quot;, # Required. A mask specifying which fields in InstanceConfig should be updated. The field mask must always be specified; this prevents any future fields in InstanceConfig from being erased accidentally by clients that do not know about them. Only display_name and labels can be updated.
   &quot;validateOnly&quot;: True or False, # An option to validate, but not actually execute, a request, and provide the same response.

googleapiclient/discovery_cache/documents/spanner.v1.json

@@ -4145,6 +4145,12 @@
 ],
 "readOnly": true,
 "type": "string"
+},
+"storageLimitPerProcessingUnit": {
+"description": "Output only. The storage limit in bytes per processing unit.",
+"format": "int64",
+"readOnly": true,
+"type": "string"
 }
 },
 "type": "object"