unified-storage: Reduce calls to the user service (#102934)

* Create ListByIdOrUID in user service

* create UnstructuredToLegacyFolderList 

* update GetFolders to use list parser

* update GetDescendants to use list parser

* update UnstructuredToLegacyFolder to also make a single call to the user service

---------

Co-authored-by: Stephanie Hingtgen <stephanie.hingtgen@grafana.com>

pkg/util/xorm/session_cond.go

@@ -52,12 +52,18 @@ func (session *Session) ID(id any) *Session {
 	return session
 }
 
-// In provides a query string like "id in (1, 2, 3)"
+// In provides a query string like "id in (1, 2, 3)" using the AND conditional
 func (session *Session) In(column string, args ...any) *Session {
 	session.statement.In(column, args...)
 	return session
 }
 
+// OrIn provides a query string like "id in (1, 2, 3)" using the OR conditional
+func (session *Session) OrIn(column string, args ...any) *Session {
+	session.statement.OrIn(column, args...)
+	return session
+}
+
 // NotIn provides a query string like "id in (1, 2, 3)"
 func (session *Session) NotIn(column string, args ...any) *Session {
 	session.statement.NotIn(column, args...)

pkg/util/xorm/statement.go

@@ -201,6 +201,13 @@ func (statement *Statement) In(column string, args ...any) *Statement {
 	return statement
 }
 
+// OrIn generate "Where column IN (?) " statement
+func (statement *Statement) OrIn(column string, args ...any) *Statement {
+	in := builder.In(statement.Engine.Quote(column), args...)
+	statement.cond = statement.cond.Or(in)
+	return statement
+}
+
 // NotIn generate "Where column NOT IN (?) " statement
 func (statement *Statement) NotIn(column string, args ...any) *Statement {
 	notIn := builder.NotIn(statement.Engine.Quote(column), args...)