Upgrade to using Jakarta EE 10 from Java EE 8 by mostly following the upgrade instructions. Only the servlet package is upgrade. Other Jakarta EE components (like the persistence package that Hibernate depends on) need to be upgraded separately.
TESTED=deployed and successfully communicated with the pubapi endpoint for web WHOIS.
Note that this currently requires packaing the App Engine runtime per instructions here due to GoogleCloudPlatform/appengine-java-standard#98. This PR will only be merged until the fix is deployed to production (https://rapid.corp.google.com/#/release/serverless_runtimes_run_java/java21_20240310_21_0).
Note that Dagger currently doesn't work with the Jakarta namespace and
we have to cap the jakarta inject package version below 2.0 so that it
sill provides classes in the old namespace.
Make the necessary changes for the code base to compile with JDK 21.
Other changes:
1. Upgraded testcontainer version and the SQL image version (to be the
same as what we use in Cloud SQL). This led to some schema changes and
also changed the order of results in some test queries (for the
better I think, as the new order appears to be alphabetical).
2. Remove dependency on Truth8, which is deprecated.
3. Enable parallel Gradle task execution and greatly increased the
number of parallel tests in standardTest. Removed outcastTest.