Bump package version to 1.5.3 via npm patch release and remove extra JS files

[Copilot]

This PR applies the requested patch-version release for @vscode/extension-telemetry and removes extra JavaScript source files that were unintentionally included in the PR.

• Version update

  • Ran npm’s patch version workflow to move the package from 1.5.2 to 1.5.3.

• Cleanup from feedback

  • Removed extra files under src/common:
    • appInsightsClientFactory.js
    • baseTelemetryReporter.js
    • baseTelemetrySender.js
    • util.js

• Files updated

  • package.json: updates the package version.
  • package-lock.json: refreshes lockfile metadata to match the new package version.
  • src/common/*.js: removes unintended extra JavaScript files from this PR branch.

{
  "name": "@vscode/extension-telemetry",
  "version": "1.5.3"
}

[rzhao271]

@copilot Remove extra js files

[Copilot]

@copilot Remove extra js files

Done in commit 3853633 — removed the extra JS files from src/common.