Enable TS Server plugins on web (#47377)

* Prototype TS plugins on web

This prototype allows service plugins to be loaded on web TSServer

Main changes:

- Adds a new host entryPoint called `importServicePlugin` for overriding how plugins can be loaded. This may be async
- Implement `importServicePlugin` for webServer
- The web server plugin implementation looks for a `browser` field in the plugin's `package.json`
- It then uses `import(...)` to load the plugin (the plugin source must be compiled to support being loaded as a module)

* use default export from plugins

This more or less matches how node plugins expect the plugin module to be an init function

* Allow configure plugin requests against any web servers in partial semantic mode

* Addressing some comments

- Use result value instead of try/catch (`ImportPluginResult`)
- Add awaits
- Add logging

* add tsserverWeb to patch in dynamic import

* Remove eval

We should throw instead when dynamic import is not implemented

* Ensure dynamically imported plugins are loaded in the correct order

* Add tests for async service plugin timing

* Update src/server/editorServices.ts

Co-authored-by: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>

* Partial PR feedback

* Rename tsserverWeb to dynamicImportCompat

* Additional PR feedback

Co-authored-by: Ron Buckton <ron.buckton@microsoft.com>
Co-authored-by: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>

src/dynamicImportCompat/dynamicImportCompat.ts

@@ -0,0 +1,3 @@
+namespace ts.server {
+    export const dynamicImport = (id: string) => import(id);
+}

src/dynamicImportCompat/tsconfig.json

@@ -0,0 +1,16 @@
+{
+    "extends": "../tsconfig-library-base",
+    "compilerOptions": {
+        "outDir": "../../built/local",
+        "rootDir": ".",
+        "target": "esnext",
+        "module": "esnext",
+        "lib": ["esnext"],
+        "declaration": false,
+        "sourceMap": true,
+        "tsBuildInfoFile": "../../built/local/dynamicImportCompat.tsbuildinfo"
+    },
+    "files": [
+        "dynamicImportCompat.ts",
+    ]
+}