Complete NIO2 migration by making Path-based methods primary API

This commit completes the NIO2 migration by:

1. Removing all File-based filterFile() methods from Verifier class
2. Making Path-based filterFile() methods return Path instead of File
3. Renaming extractResourcesAsPath() back to extractResources() in AbstractMavenIntegrationTestCase
4. Updating all 687 integration test files to use the renamed extractResources() method

The integration test infrastructure now uses NIO2 Path API as the primary API:
- extractResources() returns Path (was File)
- filterFile() methods return Path (were File)
- All File-based wrapper methods have been removed

This provides a clean, modern API surface while maintaining the familiar method names.
All integration tests compile and run successfully with the new Path-based API.

Author: gnodet

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0008SimplePluginTest.java

@@ -35,7 +35,7 @@ public class MavenIT0008SimplePluginTest extends AbstractMavenIntegrationTestCas
      */
     @Test
     public void testit0008() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0008");
+        Path testDir = extractResources("/it0008");
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);
         verifier.deleteDirectory("target");

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0009GoalConfigurationTest.java

@@ -43,7 +43,7 @@ public void testit0009() throws Exception {
         // Inline version check: [3.1.0,) - current Maven version supports space in XML
         boolean supportSpaceInXml = true;
 
-        Path testDir = extractResourcesAsPath("/it0009");
+        Path testDir = extractResources("/it0009");
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);
         verifier.deleteDirectory("target");

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0010DependencyClosureResolutionTest.java

@@ -37,7 +37,7 @@ public class MavenIT0010DependencyClosureResolutionTest extends AbstractMavenInt
      */
     @Test
     public void testit0010() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0010");
+        Path testDir = extractResources("/it0010");
 
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0011DefaultVersionByDependencyManagementTest.java

@@ -35,7 +35,7 @@ public class MavenIT0011DefaultVersionByDependencyManagementTest extends Abstrac
      */
     @Test
     public void testit0011() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0011");
+        Path testDir = extractResources("/it0011");
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);
         verifier.deleteDirectory("target");

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0012PomInterpolationTest.java

@@ -32,7 +32,7 @@ public class MavenIT0012PomInterpolationTest extends AbstractMavenIntegrationTes
      */
     @Test
     public void testit0012() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0012");
+        Path testDir = extractResources("/it0012");
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);
         verifier.deleteDirectory("target");

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0018DependencyManagementTest.java

@@ -34,7 +34,7 @@ public class MavenIT0018DependencyManagementTest extends AbstractMavenIntegratio
      */
     @Test
     public void testit0018() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0018");
+        Path testDir = extractResources("/it0018");
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);
         verifier.deleteArtifacts("org.apache.maven.its.it0018");

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0019PluginVersionMgmtBySuperPomTest.java

@@ -32,7 +32,7 @@ public class MavenIT0019PluginVersionMgmtBySuperPomTest extends AbstractMavenInt
      */
     @Test
     public void testit0019() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0019");
+        Path testDir = extractResources("/it0019");
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);
         verifier.deleteDirectory("target");

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0021PomProfileTest.java

@@ -33,7 +33,7 @@ public class MavenIT0021PomProfileTest extends AbstractMavenIntegrationTestCase
      */
     @Test
     public void testit0021() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0021");
+        Path testDir = extractResources("/it0021");
 
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0023SettingsProfileTest.java

@@ -33,7 +33,7 @@ public class MavenIT0023SettingsProfileTest extends AbstractMavenIntegrationTest
      */
     @Test
     public void testit0023() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0023");
+        Path testDir = extractResources("/it0023");
 
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);

its/core-it-suite/src/test/java/org/apache/maven/it/MavenIT0024MultipleGoalExecutionsTest.java

@@ -39,7 +39,7 @@ public class MavenIT0024MultipleGoalExecutionsTest extends AbstractMavenIntegrat
      */
     @Test
     public void testit0024() throws Exception {
-        Path testDir = extractResourcesAsPath("/it0024");
+        Path testDir = extractResources("/it0024");
 
         Verifier verifier = newVerifier(testDir.toString());
         verifier.setAutoclean(false);