What you were trying wasn't clear to me , so I did it as I see it. First, your xml isn't valid---the schema messed-up <build>. Second, I usually avoid glob when I do XML---better to use findnodes or something similar. Here's the script that I ran:

#!/usr/bin/perl

use strict;
use warnings;
use XML::LibXML;

my @files = '/root/Desktop/your.xml';
    
my $parser = XML::LibXML->new();
foreach my $file( @files) {
    my $doc = $parser->parse_file($file);
    my $cmm_root_path_var = $doc->findnodes("//Test/*");
    print $doc->to_literal(), "\n";
}
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And I ran your xml through xmltidy. It's still not valid, but works for this test:

<?xml version="1.0" encoding="utf-8"?>
  <build>
    <name>lpass</name>
    <build_id>M8960AAAAANAAL1004</build_id>
    <windows_root_path cmm_root_path_var="PASS_BUILD_ROOT">\\TEST\M965
+0AAAAANAAL1004\</windows_root_path>
    <linux_root_path cmm_root_path_var="PASS_BUILD_ROOT" />
    <image_dir>lpass_proc</image_dir>
  <name>rpm</name>
  <build_id>M8960AAAAANAAR1004</build_id>
  <windows_root_path cmm_root_path_var="PM_BUILD_ROOT">\\TEST\M9650AAA
+AANAAR1004\</windows_root_path>
  <linux_root_path cmm_root_path_var="PM_BUILD_ROOT" />
  <image_dir>rpm_proc</image_dir>
  <download_file>
    <file_name>rpm.mbn</file_name>
    <file_path>rpm_proc/</file_path>
  </download_file>
  <name>wcnss</name>
  <build_id>M8960AAAAANAAW1004</build_id>
  <windows_root_path cmm_root_path_var="NSS_BUILD_ROOT">\\TEST\M9650AA
+AAANAAW1004\</windows_root_path>
  <linux_root_path cmm_root_path_var="NSS_BUILD_ROOT" />
  <image_dir>wcnss_proc</image_dir>
</build>
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