perf - registerWorkbenchContribution2 and some adoptions (#203802)

* perf - first cut workbench contributions 2

* log warning

* add tests

* tests

* fix tests

* .

* adopt a bit and add access to times

* adopt for some

* adopt for some

* .

* fix tests

* .

extensions/vscode-api-tests/package.json

@@ -30,7 +30,6 @@
     "notebookMime",
     "portsAttributes",
     "quickPickSortByLabel",
-    "readonlyMessage",
     "languageStatusText",
     "resolvers",
     "scmActionButton",
@@ -50,7 +49,6 @@
     "treeViewReveal",
     "workspaceTrust",
     "telemetry",
-    "testingActiveProfile",
     "windowActivity"
   ],
   "private": true,