perf: add dynamically loaded cache-dependencies module

This reduces the main bundle size by ⚠️  1.1 MB minified! This bundle is loaded only when caching is enabled.

The reason for this huge reduction is that caching dependencies uses the `@actions/cache` package, which is an extremely large package with big dependencies.

`setup-python` is used in `setup-cpp` as a library. This optimization reduces the bundle size for that package as well.

__tests__/utils.test.ts

@@ -8,14 +8,14 @@ import path from 'path';
 import {
   validateVersion,
   validatePythonVersionFormatForPyPy,
-  isCacheFeatureAvailable,
   getVersionInputFromFile,
   getVersionInputFromPlainFile,
   getVersionInputFromTomlFile,
   getNextPageUrl,
   IS_WINDOWS,
   getDownloadFileName
 } from '../src/utils';
+import {isCacheFeatureAvailable} from '../src/cache-dependencies';
 
 jest.mock('@actions/cache');
 jest.mock('@actions/core');