Adding support in cache package to check if Artifact Cache service is enabled or not (#1028)

* Added support to check if Artifact cache service is enabled or not.

* enablingForGHES

* added ACTIONS_CACHE_URL in fixtures

* Fix CI

* CI fix

* changed function name

* Function rename

* Updated release

* added test case

* Update RELEASES.md

* Lint errors

* lint

* linting

* lint

* update name to actions service

* Update packages/cache/src/internal/cacheUtils.ts

Co-authored-by: Brian Cristante <33549821+brcrista@users.noreply.github.com>

* review comments

* linting

* linting

* push to start CI

* Update RELEASES.md

* remove extra spaces

* reverting version update

* Revert "reverting version update"

This reverts commit af84eba61ef8c119458dc0ce1da85b01d61b9d13.

* Update RELEASES.md

Co-authored-by: Brian Cristante <33549821+brcrista@users.noreply.github.com>

src/cache.ts

@@ -43,6 +43,16 @@ function checkKey(key: string): void {
   }
 }
 
+/**
+ * isFeatureAvailable to check the presence of Actions cache service
+ *
+ * @returns boolean return true if Actions cache service feature is available, otherwise false
+ */
+
+export function isFeatureAvailable(): boolean {
+  return !!process.env['ACTIONS_CACHE_URL']
+}
+
 /**
  * Restores cache from keys
  *