Use Jenkins project mirrors / caches

[timja]

What feature do you want to see added?

Ideally we should utilise maven caches if available (without forcing people to use them who use the framework)

This build failed:
https://ci.jenkins.io/blue/organizations/jenkins/Core%2Facceptance-test-harness/detail/master/601/pipeline/

Because of:

[2022-10-02T22:45:56.251Z] [ERROR] Error executing Maven.
[2022-10-02T22:45:56.251Z] [ERROR] Extension io.jenkins.tools.incrementals:git-changelist-maven-extension:1.4 or one of its dependencies could not be resolved: Could not transfer artifact org.apache.maven.resolver:maven-resolver-util:jar:1.0.3 from/to central (https://repo.maven.apache.org/maven2): transfer failed for https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-util/1.0.3/maven-resolver-util-1.0.3.jar
[2022-10-02T22:45:56.251Z] [ERROR] Caused by: Could not transfer artifact org.apache.maven.resolver:maven-resolver-util:jar:1.0.3 from/to central (https://repo.maven.apache.org/maven2): transfer failed for https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-util/1.0.3/maven-resolver-util-1.0.3.jar
[2022-10-02T22:45:56.251Z] [ERROR] Caused by: Could not transfer artifact org.apache.maven.resolver:maven-resolver-util:jar:1.0.3 from/to central (https://repo.maven.apache.org/maven2): transfer failed for https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-util/1.0.3/maven-resolver-util-1.0.3.jar
[2022-10-02T22:45:56.251Z] [ERROR] Caused by: transfer failed for https://repo.maven.apache.org/maven2/org/apache/maven/resolver/maven-resolver-util/1.0.3/maven-resolver-util-1.0.3.jar
[2022-10-02T22:45:56.251Z] [ERROR] Caused by: Connect to repo.maven.apache.org:443 [repo.maven.apache.org/146.75.32.215] failed: Connection timed out (Connection timed out)
[2022-10-02T22:45:56.251Z] [ERROR] Caused by: Connection timed out (Connection timed out)

Upstream changes

No response

[lemeurherve]

Commenting as I can't assign myself on this issue, I'll update the pipeline to use the artifact caching proxy.

Ref for internal GitHub linking: jenkins-infra/helpdesk#2752

[basil]

Contra jenkins-infra/helpdesk#3481 (comment) this ticket remains open, but much preparatory work has been done. The only remaining work is to wrap the mvn and run.sh invocations in the Jenkinsfile with infra.withArtifactCachingProxy, but when I tried to do that in #1097 the builds became unstable due to jenkins-infra/helpdesk#3481, so I left that change to the assignee of this ticket.