Introduce an option to skip the tool cache

Author: sethvargo

action.yml

@@ -77,6 +77,18 @@ inputs:
     default: false
     required: false
 
+  skip_tool_cache:
+    description: |-
+      Skip transferring the downloaded artifacts into the runner's tool cache.
+      On GitHub-managed runners, this makes no difference since they are
+      ephemeral. On self-hosted runners, this controls whether the downloads are
+      cached stored on the disk.
+
+      For backwards-compatibility, this is is "false" by default. Setting the
+      value to "true" can significantly speed up installation times.
+    default: false
+    required: false
+
 outputs:
   version:
     description: |-