Try to workaround OOM errors and the runners dying (#3013)

* Try to workaround OOM errors and the runner dying

* Some more tweaks:

- Add `-XX:MaxMetaspaceSize` (https://github.com/gradle/gradle/issues/19750)
- Remove `-PpreDexEnable` as it's deprecated and no longer used.
- Remove `--max-workers` as gradle will automatically use the optimal amount.

* Remove `--max-workers` in recording screenshots too

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ on:
 # Enrich gradle.properties for CI/CD
 env:
   GRADLE_OPTS: -Dorg.gradle.jvmargs="-Xmx7g -XX:MaxMetaspaceSize=512m -Dfile.encoding=UTF-8 -XX:+HeapDumpOnOutOfMemoryError" -Dkotlin.incremental=false -XX:+UseG1GC
-  CI_GRADLE_ARG_PROPERTIES: --stacktrace -PpreDexEnable=false --max-workers 8 --warn -Dsonar.gradle.skipCompile=true
+  CI_GRADLE_ARG_PROPERTIES: --stacktrace -Dsonar.gradle.skipCompile=true
 
 jobs:
   tests: