DP-13727 Add CodeArtifact package paths to service.yml (#724)

One of the Capsaicin requirements requires that all artifacts uploaded to CodeArtifacts come from specific Semaphore jobs.
This PR adds package_paths to service.yml so that each GitHub repo can declare the path of the CodeArtifact packages that it writes to.
For newer GitHub repos, the package_paths needs to be added to the service.yml file manually before it can write to CodeArtifact in the Semaphore pipeline.
For more information about this, see https://confluent.slack.com/archives/C038ZJ00P/p1708464192287999

service.yml

@@ -14,3 +14,8 @@ semaphore:
   extra_build_args: "-Dcloud -Pjenkins"
   run_pint_merge: true
   generate_connect_changelogs: true
+code_artifact:
+  enable: true
+  package_paths:
+    - maven-snapshots/maven/io.confluent/kafka-connect-s3
+    - maven-snapshots/maven/io.confluent/kafka-connect-storage-cloud