Action size: Reduce duplication between upload-lib and entry-points

[henrymercer]

Reduce the duplication between upload-lib and entry-points by exporting lib/upload-lib.js from entry-points and having lib/upload-lib.js simply re-export those exports instead of duplicating implementations.

Risk assessment

For internal use only. Please select the risk level of this change:

• Low risk: Changes are fully under feature flags, or have been fully tested and validated in pre-production environments and are highly observable, or are documentation or test only.

Which use cases does this change impact?

Only impacts internal workflows that were directly importing upload-lib.

How did/will you validate this change?

• Test repository - This change will be tested on a test repository before merging.

If something goes wrong after this change is released, what are the mitigation and rollback strategies?

• Rollback - Change can only be disabled by rolling back the release or releasing a new version with a fix.

How will you know if something goes wrong after this change is released?

Internal only.

Are there any special considerations for merging or releasing this change?

• No special considerations - This change can be merged at any time.

Merge / deployment checklist

• Confirm this change is backwards compatible with existing workflows.
• Consider adding a changelog entry for this change.
• Confirm the readme and docs have been updated if necessary.