Allow setup action to just restore maven cache

Useful for jobs which can make use of cached maven repo
but are not downloading whole repo by themselves so the maven repo
as left by the job should not be cached.

Author: losipiuk

.github/actions/setup/action.yml

@@ -5,7 +5,7 @@ inputs:
     description: "Java version to setup"
     default: 17
   cache:
-    description: "Cache Maven repo"
+    description: "Cache Maven repo (true/false/restore)"
     default: true
   download_dependencies:
     description: "Download all Maven dependencies so Maven can work in offline mode"
@@ -38,7 +38,7 @@ runs:
         with:
           distribution: 'temurin' # use same JDK distro as in Trino docker images
           java-version: ${{ inputs.java-version }}
-      - name: Cache local Maven repo
+      - name: Cache and Restore local Maven repo
         id: cache
         if: ${{ format('{0}', inputs.cache) == 'true' }}
         uses: actions/cache@v3
@@ -47,6 +47,15 @@ runs:
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
           restore-keys: |
             ${{ runner.os }}-maven-
+      - name: Restore local Maven repo
+        id: cache_restore
+        if: ${{ format('{0}', inputs.cache) == 'restore' }}
+        uses: actions/cache/restore@v3
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
       - name: Fetch any missing dependencies
         shell: bash
         if: ${{ format('{0}', inputs.download_dependencies) == 'true' }}