chore: Upgrade to latest LTS core version supporting Java 8 (requires 2.479.1)

[gounthar]

Hello google-compute-engine developers! 👋

This is an automated pull request created by the Jenkins Plugin Modernizer tool. The tool has applied the following recipes to modernize the plugin:

Upgrade to latest LTS core version supporting Java 8

io.jenkins.tools.pluginmodernizer.UpgradeToLatestJava8CoreVersion

Upgrade to latest LTS core version supporting Java 8.

Removing developers Tag from pom.xml

Jenkins no longer requires the developers tag in pom.xml, as the developers section was traditionally used to list individuals responsible for the plugin.
Instead, Jenkins now uses the Repository Permission Updater (RPU) to manage permissions and developer information.

Benefits of Removing developers Tag:

• Simplification: Removes unnecessary metadata from the pom.xml, resulting in a cleaner and more maintainable file.
• Consistency: Centralizes developer information management through the RPU, minimizing discrepancies.
• Security: Utilizes the RPU's controlled permission management, enhancing the security of artifact deployments.

Removing the developers tag aligns with modern Jenkins infrastructure standards and prevents outdated or redundant developer information from being included in plugin metadata.

[gbhat618]

seems this should be closed with reason as #517 (comment)
the follow PR #520 looks to be the correct one