perf: add dynamically loaded cache-dependencies module

[aminya]

Description: This reduces the main bundle size by ⚠️ 1.28 MB minified! This bundle is loaded only when caching is enabled.

setup-python is used in setup-cpp as a library. This optimization reduces the bundle size for that package as well. The build system of setup-python uses ncc, which doesn't immediately benefit from this change, but setup-cpp uses Parcel, which shows this huge improvement.

The reason for this huge reduction is that caching the dependencies uses the @actions/cache package, which is an extremely large package with big dependencies. The bundle size before this separation shows this:

Related issue:

Check list:

• [ ] Mark if documentation changes are required.
• [ ] Mark if tests were added or updated to cover the changes.

[aminya]

@konradpabjan could you review this?