Set up Renovate for Java updates (#14872)

Author: trask

.github/renovate.json5

@@ -347,6 +347,18 @@
     },
   ],
   customManagers: [
+    {
+      customType: 'regex',
+      datasourceTemplate: 'java-version',
+      managerFilePatterns: [
+        '.github/workflows/**'
+      ],
+      matchStrings: [
+        '(?<currentValue>\\d+) # renovate: datasource=java-version',
+      ],
+      depNameTemplate: 'java',
+      extractVersionTemplate: '^(?<version>\\d+)',
+    },
     {
       customType: 'regex',
       datasourceTemplate: 'pypi',

.github/workflows/build-common.yml

@@ -238,9 +238,7 @@ jobs:
           - 11
           - 17
           - 21
-          - 23
-          - 24
-          - 25-ea
+          - 24 # renovate: datasource=java-version
         vm:
           - hotspot
           - openj9
@@ -254,11 +252,7 @@ jobs:
           - true
         exclude:
           - vm: ${{ inputs.skip-openj9-tests && 'openj9' || '' }}
-          - test-java-version: 23
-            vm: hotspot
-          - test-java-version: 24
-            vm: openj9
-          - test-java-version: 25-ea
+          - test-java-version: 24 # renovate: datasource=java-version
             vm: openj9
       fail-fast: false
     steps: