Increase Jruby -Xmx to avoid OOM during zip task in DRA (#16408) (#16409

)

Fix: #16406
(cherry picked from commit 6e93b30)

Co-authored-by: kaisecheng <69120390+kaisecheng@users.noreply.github.com>

.buildkite/scripts/dra/common.sh

@@ -29,7 +29,7 @@ function save_docker_tarballs {
 # Since we are using the system jruby, we need to make sure our jvm process
 # uses at least 1g of memory, If we don't do this we can get OOM issues when
 # installing gems. See https://github.com/elastic/logstash/issues/5179
-export JRUBY_OPTS="-J-Xmx1g"
+export JRUBY_OPTS="-J-Xmx2g"
 
 # Extract the version number from the version.yml file
 # e.g.: 8.6.0