Increase maximum depth of outlining span search (#18704)

* Increase max depth of outlining spans to 120

* Update tests

* Update tests to demonstrate limit

* Set limit to 40 and update tests

src/services/outliningElementsCollector.ts

@@ -1,7 +1,7 @@
 /* @internal */
 namespace ts.OutliningElementsCollector {
     const collapseText = "...";
-    const maxDepth = 20;
+    const maxDepth = 40;
     const defaultLabel = "#region";
     const regionMatch = new RegExp("^\\s*//\\s*#(end)?region(?:\\s+(.*))?$");