Sync eng/common directory with azure-sdk-tools for PR 14463

[azure-sdk]

Sync eng/common directory with azure-sdk-tools for PR Azure/azure-sdk-tools#14463 See eng/common workflow

[Copilot]

Pull request overview

Syncs eng/common pipeline templates with the corresponding updates from azure-sdk-tools PR 14463, primarily to improve npm registry configurability and to scope npm authentication setup to the publish path that needs it.

Changes:

• Add an optional NpmConfigRegistry parameter to relevant pipeline steps and plumb it through as NPM_CONFIG_REGISTRY.
• Adjust the npm publish job to only create/authenticate an .npmrc for non-npmjs registries (direct npm publish path).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
eng/common/pipelines/templates/steps/update-docsms-metadata.yml	Adds NpmConfigRegistry parameter and exports it via NPM_CONFIG_REGISTRY for the docs metadata update script environment.
eng/common/pipelines/templates/steps/create-tags-and-git-release.yml	Adds NpmConfigRegistry parameter and exports it via NPM_CONFIG_REGISTRY for tag/release verification scripts that may invoke npm.
eng/common/pipelines/templates/jobs/npm-publish.yml	Moves .npmrc creation/authentication into the non-npmjs branch so it only runs for the direct npm publish flow.