Update SDK to the latest OpenAPI spec (#498)

## What changes are proposed in this pull request?
Update SDK to the latest OpenAPI spec

## How is this tested?
Run existing tests

Author: hectorcast-db

.codegen/_openapi_sha

@@ -1 +1 @@
-3a7fe4deb693ca98d89b044116aaf008efd895a5
+3ae6f76120079424c8654263eafbc30ec0551854

.gitattributes

@@ -16,3 +16,14 @@
 ### Internal Changes
 
 ### API Changes
+* Added `workspaceClient.policies()` service and `workspaceClient.temporaryPathCredentials()` service.
+* Added `create()` method for `workspaceClient.tables()` service.
+* Added `listDatabaseCatalogs()`, `listSyncedDatabaseTables()`, `updateDatabaseCatalog()` and `updateSyncedDatabaseTable()` methods for `workspaceClient.database()` service.
+* Added `firstOnDemand` field for `com.databricks.sdk.service.compute.GcpAttributes`.
+* Added `usagePolicyId` field for `com.databricks.sdk.service.jobs.CreateJob`.
+* Added `usagePolicyId` field for `com.databricks.sdk.service.jobs.JobSettings`.
+* Added `usagePolicyId` field for `com.databricks.sdk.service.jobs.SubmitRun`.
+* Added `clientRequestId` and `usageContext` fields for `com.databricks.sdk.service.serving.QueryEndpointInput`.
+* Added `channelId`, `channelIdSet`, `oauthToken` and `oauthTokenSet` fields for `com.databricks.sdk.service.settings.SlackConfig`.
+* Added `SNAPSHOT` enum value for `com.databricks.sdk.service.ml.PublishSpecPublishMode`.
+* [Breaking] Changed `publishMode` field for `com.databricks.sdk.service.ml.PublishSpec` to be required.