Record user and session data properly for telemetry

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 https://github.com/microsoft/vscode-extension-telemetry/pull/210 We also submitted a PR that has been merged to address the session ID issue: https://github.com/microsoft/vscode-extension-telemetry/pull/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:

Change panelOpen event to panelOpen-test20
Open extension
Check in Application Insights that the new event arrived and it has distinct user id and session set.

software-mansion / radon-ide

Record user and session data properly for telemetry #748

How Has This Been Tested: