Changed phase of archive step in product pom file (chosen solution)

Resolves GitLab issue 3213 (https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/3213)

releng/org.eclipse.app4mc.platform.product/pom.xml

diff --git a/releng/org.eclipse.app4mc.platform.product/pom.xml b/releng/org.eclipse.app4mc.platform.product/pom.xml
index d0412c1..d13366a 100644
--- a/releng/org.eclipse.app4mc.platform.product/pom.xml
+++ b/releng/org.eclipse.app4mc.platform.product/pom.xml
@@ -129,6 +129,7 @@
 						<goals>
 							<goal>archive-products</goal>
 						</goals>
+						<phase>pre-integration-test</phase> <!-- to ensure valid signature of executable -->
 						<configuration>
 							<formats>
 								<linux>tar.gz</linux>