This updates the gradle wrapper to 8.12
We addressed deprecation warnings due to the update that includes:
- Fix change in TestOutputEvent api
- Fix deprecation in groovy syntax
- Use latest ospackage plugin containing our fix
- Remove project usages at execution time
- Fix deprecated project references in repository-old-versions
(cherry picked from commit ba61f8c7f7)
# Conflicts:
# build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/distribution/DockerCloudElasticsearchDistributionType.java
# build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/distribution/DockerUbiElasticsearchDistributionType.java
# build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/test/Fixture.java
# plugins/repository-hdfs/hadoop-client-api/build.gradle
# server/src/main/java/org/elasticsearch/inference/ChunkingOptions.java
# x-pack/plugin/kql/build.gradle
# x-pack/plugin/migrate/build.gradle
# x-pack/plugin/security/qa/security-basic/build.gradle
4d17b2193a