Remove the dependency to Plexus, replaced by more reliance on java.nio.

This commit contains the following work items:

* Replacement of Plexus includes/excludes filters by `java.nio.file.PathMatcher`.
  One benefit is the support of different syntax, at least "glob" and "regex".
  If no syntax is specified, default to the "glob" syntax with modifications
  for reproducing the behavior of Plexus filters when it differs from "glob".

* Use `java.nio.file.FileVisitor` for walking over files and directory trees.
  Consequently, the following of symbolic links is now handled by `FileVisitor`
  instead of by `maven-clean-plugin` itself. An advantage is that `FileVisitor`
  is safe against infinite loops when there is cycles in the symbolic links.
  Also, file attributes (whether the file is regular, a directory or a link)
  are queried only once per file.

* Changes in some logging messages and exceptions. "Deleting XYZ" is replaced
  by either "Deleted XYZ" if the deletion has been successful, or replaced by
  "Failed to delete XYZ" in case of failure (i.e., "XYZ" is not logged twice
  in case of failure).

* The `IOException` throws by Java is no longer wrapped in another `IOException`,
  so that the callers can catch an exception of the specific sub-type if desired.
  The exception is also thrown earlier, before it causes another exception.
  The difference can be seen in the tests: a deletion fails because unauthorized,
  but the error that was reported to the user was not the `AccessDeniedException`.
  Instead, it was a `DirectoryNotEmptyException` thrown when the plugin tried to
  delete the directory that contains the file that the plugin failed to delete.
  After this commit, the exception throws is the original `AccessDeniedException`.

Author: desruisseaux

src/main/java/org/apache/maven/plugins/clean/CleanMojo.java

@@ -222,7 +222,7 @@ public class CleanMojo implements org.apache.maven.api.plugin.Mojo {
     @Override
     public void execute() {
         if (skip) {
-            getLog().info("Clean is skipped.");
+            logger.info("Clean is skipped.");
             return;
         }
 
@@ -236,7 +236,7 @@ public void execute() {
         } else {
             fastDir = null;
             if (fast) {
-                getLog().warn("Fast clean requires maven 3.3.1 or newer, "
+                logger.warn("Fast clean requires maven 3.3.1 or newer, "
                         + "or an explicit directory to be specified with the 'fastDir' configuration of "
                         + "this plugin, or the 'maven.clean.fastDir' user property to be set.");
             }
@@ -248,37 +248,22 @@ public void execute() {
             throw new IllegalArgumentException("Illegal value '" + fastMode + "' for fastMode. Allowed values are '"
                     + FAST_MODE_BACKGROUND + "', '" + FAST_MODE_AT_END + "' and '" + FAST_MODE_DEFER + "'.");
         }
-
-        Cleaner cleaner = new Cleaner(session, getLog(), isVerbose(), fastDir, fastMode);
-
+        final var cleaner =
+                new Cleaner(session, logger, isVerbose(), fastDir, fastMode, followSymLinks, failOnError, retryOnError);
         try {
             for (Path directoryItem : getDirectories()) {
                 if (directoryItem != null) {
-                    cleaner.delete(directoryItem, null, followSymLinks, failOnError, retryOnError);
+                    cleaner.delete(directoryItem);
                 }
             }
-
             if (filesets != null) {
                 for (Fileset fileset : filesets) {
                     if (fileset.getDirectory() == null) {
                         throw new MojoException("Missing base directory for " + fileset);
                     }
-                    final String[] includes = fileset.getIncludes();
-                    final String[] excludes = fileset.getExcludes();
-                    final boolean useDefaultExcludes = fileset.isUseDefaultExcludes();
-                    final GlobSelector selector;
-                    if ((includes != null && includes.length != 0)
-                            || (excludes != null && excludes.length != 0)
-                            || useDefaultExcludes) {
-                        selector = new GlobSelector(includes, excludes, useDefaultExcludes);
-                    } else {
-                        selector = null;
-                    }
-                    cleaner.delete(
-                            fileset.getDirectory(), selector, fileset.isFollowSymlinks(), failOnError, retryOnError);
+                    cleaner.delete(fileset);
                 }
             }
-
         } catch (IOException e) {
             throw new MojoException("Failed to clean project: " + e.getMessage(), e);
         }
@@ -290,7 +275,7 @@ public void execute() {
      * @return <code>true</code> if verbose output is enabled, <code>false</code> otherwise.
      */
     private boolean isVerbose() {
-        return (verbose != null) ? verbose : getLog().isDebugEnabled();
+        return (verbose != null) ? verbose : logger.isDebugEnabled();
     }
 
     /**
@@ -307,8 +292,4 @@ private Path[] getDirectories() {
         }
         return directories;
     }
-
-    private Log getLog() {
-        return logger;
-    }
 }