Bump @opentelemetry/core and @vscode/extension-telemetry (#1053)

* Bump @opentelemetry/core and @vscode/extension-telemetry

Removes [@opentelemetry/core](https://github.com/open-telemetry/opentelemetry-js). It's no longer used after updating ancestor dependency [@vscode/extension-telemetry](https://github.com/Microsoft/vscode-extension-telemetry). These dependencies need to be updated together.


Removes `@opentelemetry/core`

Updates `@vscode/extension-telemetry` from 0.8.5 to 1.5.2
- [Release notes](https://github.com/Microsoft/vscode-extension-telemetry/releases)
- [Commits](microsoft/vscode-extension-telemetry@v0.8.5...v1.5.2)

---
updated-dependencies:
- dependency-name: "@opentelemetry/core"
  dependency-version:
  dependency-type: indirect
- dependency-name: "@vscode/extension-telemetry"
  dependency-version: 1.5.2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* Fix telemetry reporter imports for extension-telemetry update

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Raymond Zhao <7199958+rzhao271@users.noreply.github.com>

Author: 3 people