Remove customNPMRegistry overrides from pipeline templates and apply lockfile audit remediations

[Copilot]

This PR removes deprecated/explicit npm registry overrides from Azure pipeline templates and applies npm audit fix updates to reduce dependency risk in the lockfile.

• Pipeline template cleanup

  • Removed customNPMRegistry: '' from:
    • build/azure-pipeline.pr.yml
    • build/azure-pipeline.pre-release.yml
  • Leaves template defaults in control of npm registry behavior.

• Dependency audit remediation

  • Ran npm audit fix, updating vulnerable transitive packages in package-lock.json (no direct dependency API changes).
  • Includes lockfile-level upgrades such as form-data, hasown, js-yaml, mocha, and tar where resolvable.

# before
parameters:
  customNPMRegistry: ''
  l10nSourcePaths: ./src

# after
parameters:
  l10nSourcePaths: ./src

Original prompt

Remove customnpmregistry override from pipeline templates. Also run npm audit fix. Create a PR.

Created from VS Code.

[rzhao271]

@copilot Replace postinstall downloads with new devDependencies.

[Copilot]

@copilot Replace postinstall downloads with new devDependencies.

I can make this change, but I need the exact package names/versions you want for the replacement. Should I switch to @types/vscode + @vscode/pyodide, or a different dependency set?