Replace the XMLParser and XMLNodePrinter with those in the groovy.xml…

[ZiySir]

Before this PR

In Gradle 9+ environments, the project fails with a NoClassDefFoundError because it relies on XMLParser and XMLNodePrinter from the legacy groovy.util package.
These classes are no longer available or accessible under newer Gradle/Groovy distributions, causing builds to break.

After this PR

The XML parsing and printing logic is updated to use groovy.xml.XmlParser and groovy.xml.XmlNodePrinter.
This resolves the NoClassDefFoundError, aligns the codebase with modern Groovy XML APIs, and restores compatibility with Gradle 9+.

==COMMIT_MSG==
Replace legacy Groovy XML utilities with those from the groovy.xml package.

This change replaces:

• groovy.util.XmlParser → groovy.xml.XmlParser
• groovy.util.XmlNodePrinter → groovy.xml.XmlNodePrinter

The legacy classes cause NoClassDefFoundError under Gradle 9+, because newer Groovy distributions no longer expose them.
Switching to groovy.xml resolves the issue and improves forward compatibility.
==COMMIT_MSG==

Possible downsides?

• Minor XML formatting differences may occur because the newer printer behaves slightly differently.
• Users relying on the exact output structure or whitespace may observe small changes.

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• Improvement (Improving existing functionality)
• Fix (Fixing an issue with existing functionality)
• Break (Creating a new major version by breaking public APIs)
• Deprecation (Removing functionality in a non-breaking way)
• Migration (Automatically moving data/functionality to a new system)

Description

Replace legacy Groovy XML utilities with those from the groovy.xml package.

This change replaces:

• groovy.util.XmlParser → groovy.xml.XmlParser
• groovy.util.XmlNodePrinter → groovy.xml.XmlNodePrinter

The legacy classes cause NoClassDefFoundError under Gradle 9+, because newer Groovy distributions no longer expose them.
Switching to groovy.xml resolves the issue and improves forward compatibility.

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