feat: DH-18086: grpc transport (#202)

DH-18086: Use custom grpc transport. Note that this shouldn't introduce
any functional changes. It just enables the http based gRPC transport to
be used which will set us up for Envoy support but is also a preferred
transport to websockets.

### Testing
I've tested the following scenarios:
* Non-envoy connections should work
* Community http connections should work
* Community https connections should work if self-signed certs are
properly configured via `NODE_EXTRA_CA_CERTS`

Confirmed that setting `debug: true` shows gRPC transport logs

package.json

@@ -870,7 +870,7 @@
   "dependencies": {
     "@deephaven-enterprise/auth-nodejs": "^1.20240723.124-beta",
     "@deephaven-enterprise/query-utils": "^1.20240723.124-beta",
-    "@deephaven/jsapi-nodejs": "0.102.0",
+    "@deephaven/jsapi-nodejs": "^0.103.0",
     "nanoid": "^5.0.7"
   },
   "devDependencies": {

src/controllers/ExtensionController.ts

@@ -1,6 +1,13 @@
 import * as vscode from 'vscode';
 import type { dh as DhcType } from '@deephaven/jsapi-types';
 import type { EnterpriseDhType as DheType } from '@deephaven-enterprise/jsapi-types';
+import {
+  createClient as createDheClient,
+  getWsUrl,
+  type AuthenticatedClient as DheAuthenticatedClient,
+  type UnauthenticatedClient as DheUnauthenticatedClient,
+} from '@deephaven-enterprise/auth-nodejs';
+import { NodeHttp2gRPCTransport } from '@deephaven/jsapi-nodejs';
 import {
   CLEAR_SECRET_STORAGE_CMD,
   CREATE_NEW_TEXT_DOC_CMD,
@@ -76,12 +83,6 @@ import { ConnectionController } from './ConnectionController';
 import { PipServerController } from './PipServerController';
 import { PanelController } from './PanelController';
 import { UserLoginController } from './UserLoginController';
-import {
-  createClient as createDheClient,
-  getWsUrl,
-  type AuthenticatedClient as DheAuthenticatedClient,
-  type UnauthenticatedClient as DheUnauthenticatedClient,
-} from '@deephaven-enterprise/auth-nodejs';
 
 const logger = new Logger('ExtensionController');
 
@@ -343,9 +344,8 @@ export class ExtensionController implements Disposable {
       const dhc = await this._coreJsApiCache.get(url);
 
       const client = new dhc.CoreClient(url.toString(), {
-        // `useWebsockets: true` is needed for 0.37.x servers until we enable
-        // the http2 based gRPC transport DH-18086
-        useWebsockets: true,
+        debug: false, // Set `debug` to true to see debug logs for gRPC transport
+        transportFactory: NodeHttp2gRPCTransport.factory,
       }) as CoreUnauthenticatedClient;
 
       // Attach a dispose method so that client caches can dispose of the client