feat(cloudbilling): update the api

#### cloudbilling:v1beta

The following keys were added:
- resources.billingAccounts.methods.estimateCostScenario.deprecated (Total Keys: 1)
- resources.v1beta (Total Keys: 2)

Author: yoshi-automation

googleapiclient/discovery_cache/documents/cloudbilling.v1.json

@@ -751,7 +751,7 @@
 }
 }
 },
-"revision": "20240517",
+"revision": "20240531",
 "rootUrl": "https://cloudbilling.googleapis.com/",
 "schemas": {
 "AggregationInfo": {

googleapiclient/discovery_cache/documents/cloudbilling.v1beta.json

@@ -114,6 +114,7 @@
 "billingAccounts": {
 "methods": {
 "estimateCostScenario": {
+"deprecated": true,
 "description": "Use custom pricing in the estimate, using a `CostScenario` with a defined `billingAccount`.",
 "flatPath": "v1beta/billingAccounts/{billingAccountsId}:estimateCostScenario",
 "httpMethod": "POST",
@@ -734,8 +735,10 @@
 }
 },
 "v1beta": {
+"deprecated": true,
 "methods": {
 "estimateCostScenario": {
+"deprecated": true,
 "description": "Estimate list prices using a `CostScenario` without a defined `billingAccount`.",
 "flatPath": "v1beta:estimateCostScenario",
 "httpMethod": "POST",
@@ -758,7 +761,7 @@
 }
 }
 },
-"revision": "20240517",
+"revision": "20240531",
 "rootUrl": "https://cloudbilling.googleapis.com/",
 "schemas": {
 "CacheFillRegions": {