Summary: Cleanup copying flow, fix lint issues. Add sky files to linters.

Test Plan: tested script manually

Reviewers: michelle, vihang, philkuz

Reviewed By: vihang

JIRA Issues: PP-2507

Differential Revision: https://phab.corp.pixielabs.ai/D8289

GitOrigin-RevId: cd5ed45c4eec15089989a7da5a57fec51d9bcfce