Use monolithic cache for Gradle User Home

- Do not restore cache when GUH exists
- Include RUNNER_OS in the cache key
- Do not save cache on exact hit
- Only save cache in the final post action
- Log before saving cache

src/execution.ts

@@ -1,15 +1,10 @@
 import * as exec from '@actions/exec'
-import * as cacheDependencies from './cache-dependencies'
-import * as cacheConfiguration from './cache-configuration'
 
 export async function execute(
     executable: string,
     root: string,
     argv: string[]
 ): Promise<BuildResult> {
-    await cacheDependencies.restoreCachedDependencies(root)
-    await cacheConfiguration.restoreCachedConfiguration(root)
-
     let publishing = false
     let buildScanUrl: string | undefined