Bump applicationinsights from 1.8.7 to 2.3.5 in /extensions/ql-vscode (#1515)

Bumps [applicationinsights](https://github.com/microsoft/ApplicationInsights-node.js) from 1.8.7 to 2.3.5.
- [Release notes](https://github.com/microsoft/ApplicationInsights-node.js/releases)
- [Commits](microsoft/ApplicationInsights-node.js@1.8.7...2.3.5)

---
updated-dependencies:
- dependency-name: applicationinsights
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]