Add OSS stub functions for Self-Managed Static Roles

changelog/28199.txt

@@ -0,0 +1,3 @@
+```release-note:feature
+**Self-Managed Static Roles**: Self-Managed Static Roles are now supported for select SQL database engines (Postgres, Oracle). Requires Vault Enterprise.
+```

sdk/database/dbplugin/v5/database.go

@@ -181,6 +181,13 @@ type UpdateUserRequest struct {
 	// Expiration indicates the new expiration date to change to.
 	// If nil, no change is requested.
 	Expiration *ChangeExpiration
+
+	// SelfManagedPassword is the password for an externally managed user in the DB.
+	// If this field is supplied, a DB connection is retrieved from the static
+	// account cache for the particular DB plugin and used to update the password of
+	// the self-managed static role.
+	// *ENTERPRISE-ONLY*
+	SelfManagedPassword string
 }
 
 // ChangePublicKey of a given user

sdk/database/helper/connutil/sql_stubs_oss.go

@@ -0,0 +1,18 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+//go:build !enterprise
+
+package connutil
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+)
+
+//go:generate go run github.com/hashicorp/vault/tools/stubmaker
+
+func (c *SQLConnectionProducer) StaticConnection(_ context.Context, _, _ string) (*sql.DB, error) {
+	return nil, errors.New("self-managed static roles not implemented in CE")
+}