[MSOURCES-149] Switch to the Maven 4 API

IT MSOURCES-140 is broken because of apache/maven#1587

# Conflicts:
#	pom.xml
#	src/test/java/org/apache/maven/plugins/source/SourceJarMojoTest.java

Author: gnodet

.github/workflows/maven-verify.yml

@@ -25,3 +25,7 @@ jobs:
   build:
     name: Verify
     uses: apache/maven-gh-actions-shared/.github/workflows/maven-verify.yml@v4
+    with:
+      ff-maven: "4.0.0-beta-3"                     # Maven version for fail-fast-build
+      maven-matrix: '[ "4.0.0-beta-3" ]'
+      jdk-matrix: '[ "17", "21" ]'

src/it/MSOURCES-121/verify.groovy

@@ -19,4 +19,5 @@
 
 File buildLog = new File( basedir, 'build.log' )
 
-assert buildLog.text =~ /\[ERROR\] Artifact org.apache.maven.its.sources:jar-no-fork:java-source:sources:1.0-SNAPSHOT already attached to a file target.jar-no-fork-1.0-SNAPSHOT-sources.jar: attach to target.jar-no-fork-1.0-SNAPSHOT-secondary-sources.jar should be done with another classifier/
+var fs = File.separatorChar == '\\' ? "\\\\" : "/"
+assert buildLog.text =~ /\[ERROR\] Artifact org.apache.maven.its.sources:jar-no-fork:jar:sources:1.0-SNAPSHOT already attached to a file target${fs}jar-no-fork-1.0-SNAPSHOT-sources.jar: attach to target${fs}jar-no-fork-1.0-SNAPSHOT-secondary-sources.jar should be done with another classifier/

src/it/MSOURCES-140/invoker.properties

@@ -16,3 +16,6 @@
 # under the License.
 invoker.buildResult = success
 invoker.goals = package clean install
+
+# maven 4.0.0-beta-3 is broken because of https://github.com/apache/maven/pull/1587
+invoker.maven.version = 4.0.0-beta-4+

src/it/MSOURCES-140/verify.groovy

@@ -19,4 +19,4 @@
 
 File buildLog = new File( basedir, 'build.log' )
 
-assert buildLog.text =~ /\[INFO\] Artifact org.apache.maven.its.sources:jar-no-fork:java-source:sources:1.0-SNAPSHOT already attached to target.jar-no-fork-1.0-SNAPSHOT-sources.jar: ignoring same re-attach \(same artifact, same file\)/
+assert buildLog.text =~ /\[INFO\] Artifact org.apache.maven.its.sources:jar-no-fork:jar:sources:1.0-SNAPSHOT already attached to target" + File.separator + "jar-no-fork-1.0-SNAPSHOT-sources.jar: ignoring same re-attach \(same artifact, same file\)/

src/it/MSOURCES-62/pom.xml

@@ -39,7 +39,6 @@ under the License.
               <phase>package</phase>
               <configuration>
                 <archive>
-                  <index>true</index>
                   <addMavenDescriptor>false</addMavenDescriptor>
                   <compress>true</compress>
                   <manifestEntries>