Configure npm distribution mirror and inventory syncing

Updates the automation workflows to:
- use reusable workflows to reduce duplication of steps
- adds support for `npm` in the list of distributions to mirror to S3
- adds support for `npm` for synchronizing `inventory.toml` updates
- updates the helper binaries used in the automation to support `npm`

[W-13916385](https://gus.lightning.force.com/a07EE00001XwfoGYAR)

.github/workflows/_mirror-distribution.yml

@@ -47,7 +47,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        distribution: [${{ inputs.distribution }}]
+        distribution: ${{ inputs.distribution }}
         version: ${{ fromJson(needs.get-unmirrored-versions.outputs.versions) }}
         include:
           - distribution: node