[FLINK-34419][docker] Added support of JDK 17 & 21 for Flink 1.18+ versions

Author: morazow

.github/workflows/snapshot.yml

@@ -36,15 +36,18 @@ jobs:
     strategy:
       max-parallel: 1
       matrix:
-        java_version: [8, 11]
         build:
           - flink_version: 1.20-SNAPSHOT
+            java_version: [8, 11, 17, 21]
             branch: dev-master
           - flink_version: 1.19-SNAPSHOT
+            java_version: [8, 11, 17, 21]
             branch: dev-1.19
           - flink_version: 1.18-SNAPSHOT
+            java_version: [8, 11, 17]
             branch: dev-1.18
           - flink_version: 1.17-SNAPSHOT
+            java_version: [8, 11]
             branch: dev-1.17
     steps:
       - uses: actions/checkout@v3
@@ -63,7 +66,7 @@ jobs:
       - name: Log in to the Container registry
         uses: docker/login-action@v1
         with:
-          registry: ghcr.io
+          registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}