build,test: add test-digitalocean-fedora42-x64-[12] (#4110)

Refs: #4109

Author: targos

ansible/inventory.yml

@@ -95,6 +95,8 @@ hosts:
         fedora40-x64-2: {ip: 162.243.187.89}
         fedora41-x64-1: {ip: 165.227.191.35}
         fedora41-x64-2: {ip: 159.65.246.5}
+        fedora42-x64-1: {ip: 174.138.62.120}
+        fedora42-x64-2: {ip: 104.131.92.208}
         freebsd13-x64-1: {ip: 138.197.25.49, user: freebsd, swap_file_size_mb: 2048}
         freebsd13-x64-2: {ip: 159.89.188.229, user: freebsd, swap_file_size_mb: 2048}
         rhel8-x64-1: {ip: 161.35.139.78, build_test_v8: yes, swap_file_size_mb: 2048}

ansible/roles/java-base/vars/main.yml

@@ -9,6 +9,7 @@ packages: {
   'debian11': 'openjdk-17-jre-headless',
   'debian12': 'openjdk-17-jre-headless',
   'fedora': 'java-17-openjdk-headless',
+  'fedora42': 'java-21-openjdk-headless',
   'freebsd': 'openjdk17-jre',
   'macos': 'temurin17',
   'rhel7': 'java-11-openjdk',