Record user and session data properly for telemetry (#748)

This PR fixes the issue with telemetry module that wasn't collecting
user-id and session-id properly resulting in all the telemetry events
being squashed under a single user and session.

The main fix for user-id reporting has already landed in the new version
of telemetry package
microsoft/vscode-extension-telemetry#210
We also submitted a PR that has been merged to address the session ID
issue: microsoft/vscode-extension-telemetry#215

Because there's been no release since that update, we're installing a
fork of telemetry module with our changes included from
https://github.com/software-mansion-labs/vscode-extension-telemetry
Since the package requires a build-step, we've uploaded bundled JS files
into the fork repository and install the dependency using github link.

The new version of telementy module now requires a so-called "connection
string" instead of just the instrumentation key as the first argument.
Because of that we're also updating the public key value.

### How Has This Been Tested: 
1. Change panelOpen event to panelOpen-test20
2. Open extension
3. Check in Application Insights that the new event arrived and it has
distinct user id and session set.

packages/vscode-extension/.npmrc

@@ -0,0 +1 @@
+@software-mansion-labs:registry=https://npm.pkg.github.com

packages/vscode-extension/package.json

@@ -479,7 +479,7 @@
     "@vscode/codicons": "^0.0.35",
     "@vscode/debugadapter": "^1.51.0",
     "@vscode/debugprotocol": "^1.51.0",
-    "@vscode/extension-telemetry": "^0.9.6",
+    "@vscode/extension-telemetry": "github:software-mansion-labs/vscode-extension-telemetry",
     "@vscode/test-cli": "^0.0.9",
     "@vscode/test-electron": "^2.4.0",
     "@vscode/vsce": "^2.22.0",

packages/vscode-extension/src/utilities/telemetry.ts

@@ -1,13 +1,14 @@
 import TelemetryReporter from "@vscode/extension-telemetry";
 import { extensionContext } from "./extensionContext";
 
-const PUBLIC_INSIGHTS_KEY = "6709dbd6-92e7-40f6-be09-618db8a85ce9";
+const PUBLIC_APP_INSIGHTS_CONNECTION_STRING =
+  "InstrumentationKey=6709dbd6-92e7-40f6-be09-618db8a85ce9";
 
 let reporter: TelemetryReporter | undefined;
 
 export function getTelemetryReporter(): TelemetryReporter {
   if (!reporter) {
-    reporter = new TelemetryReporter(PUBLIC_INSIGHTS_KEY);
+    reporter = new TelemetryReporter(PUBLIC_APP_INSIGHTS_CONNECTION_STRING);
     extensionContext.subscriptions.push(reporter);
   }
   return reporter;