refactor: migrate to ESM and consolidate actions into shared build pipeline

[nvanthao]

Why

replicated-libs used by replicated-actions recently get updated for CVEs fixes and contain ESM code, the current replicated-actions ncc can't bundle mixed code of CommonJS and ESM.

What

• Migrate from CommonJS to ESM: Converted the entire codebase to ES modules to
  support ESM-only dependencies like updated versions of @actions/core, @actions/exec, and @actions/github.
• Replace ncc with rollup for bundling: @vercel/ncc does not support ESM output, so it was replaced with rollup
• Consolidate promote-release, get-customer-instances, report-compatibility-result, and upgrade-cluster into the shared package: These four actions previously had their own separate package.json and were built independently. Their source files have been moved into src/ and they now share the root build pipeline, matching the pattern used by the other 11 actions.
• Bump dependencies to ESM-compatible versions: @actions/core v3, @actions/exec v3, @actions/github v9, replicated-lib beta.28, and updated dev dependencies.

Test plan

• make package-all completes without errors
• All CI checks pass