Extract caching logic into a separate gradle-actions-caching component (#885)

With this change, the caching functionality of `setup-gradle` and
`dependency-submission` is now provided by `gradle-actions-caching`, a
closed-source library distributed under our [Terms of
Use](https://gradle.com/legal/terms-of-use/). The rest of the action
implementation remains open source.

Using `setup-gradle` or `dependency-submission` with caching enabled
involves loading and using the `gradle-actions-caching` component,
requiring acceptance of the [Terms of
Use](https://gradle.com/legal/terms-of-use/). There are no functional
changes to caching provided by these actions: all workflows will
continue to function as before.

The non-caching aspects of action implementation remain open source. By
running these actions with caching disabled they can be used without
ever loading `gradle-actions-caching` or accepting the license terms.

Supporting the caching infrastructure in this project requires a
substantial engineering investment by Gradle Technologies, which we can
sustain thanks to Develocity, our commercial offering. Caching
technologies are a core part of the Develocity offering, and the caching
in `setup-gradle` fits squarely in that space.

This licensing change lets us continue to build advanced capabilities
that go beyond what we would offer as open source. Proper
production-ready Configuration Cache support will be the first
capability. Improving build performance for self-hosted runners will
follow.

We may introduce functionality restrictions in future updates. However,
caching functionality will remain free for public repositories.
We have a long-standing commitment to open source, as maintainers of
Gradle Build Tool, and by [sponsoring the open source
community](https://gradle.com/oss-sponsored-by-develocity/) with free
Develocity licenses. Public repositories are primarily used by open
source projects, and we remain committed to supporting them.

- Implementation of caching logic to save and restore Gradle User Home
content has been removed, replaced by the `gradle-actions-caching`
component.
- The `@actions/caching` library is still used to cache Gradle
distributions that are downloaded and provisioned by `setup-gradle`.
This PR updates to the latest version of `@actions/caching`, and removes
the patch that is no longer required.
- License notices are now displayed in documentation, logs and the
generated Job Summary.

sources/src/job-summary.ts

@@ -1,12 +1,12 @@
 import * as core from '@actions/core'
 import * as github from '@actions/github'
 
-import {BuildResults, BuildResult} from './build-results'
+import {BuildResult} from './build-results'
 import {SummaryConfig, getActionId, getGithubToken} from './configuration'
 import {Deprecation, getDeprecations, getErrors} from './deprecation-collector'
 
 export async function generateJobSummary(
-    buildResults: BuildResults,
+    buildResults: BuildResult[],
     cachingReport: string,
     config: SummaryConfig
 ): Promise<void> {
@@ -17,9 +17,8 @@ export async function generateJobSummary(
         return
     }
 
-    const summaryTable = renderSummaryTable(buildResults.results)
-
-    const hasFailure = buildResults.anyFailed()
+    const summaryTable = renderSummaryTable(buildResults)
+    const hasFailure = anyFailed(buildResults)
     if (config.shouldGenerateJobSummary(hasFailure)) {
         core.info('Generating Job Summary')
 
@@ -133,6 +132,10 @@ function renderBuildResults(results: BuildResult[]): string {
     `
 }
 
+function anyFailed(results: BuildResult[]): boolean {
+    return results.some(result => result.buildFailed)
+}
+
 function renderBuildResultRow(result: BuildResult): string {
     return `
     <tr>