Supported "initializer block" arrangement entry (IDEA-95115)

Previous behaviour was to treat initializer block as field and stick it with previous field, now it's eliminated with matching and rearranging according to matching rules. See comments also in [CR-IC-6618]

java/java-tests/testSrc/com/intellij/psi/codeStyle/arrangement/JavaRearrangerByTypeAndModifierTest.groovy

@@ -83,9 +83,10 @@ class Test {
       expected: '''\
 class Test {
   public int j;
-  { j = 1; }
   protected int k;
   private int i;
+
+  { j = 1; }
 }''',
       rules: [rule(FIELD, PUBLIC), rule(FIELD, PROTECTED), rule(FIELD, PRIVATE)])
   }
@@ -101,10 +102,11 @@ class Test {
 }''',
       expected: '''\
 class Test {
-  { j = 1; }
   public int j;
   protected int k;
   private int i;
+
+  { j = 1; }
 }''',
       rules: [rule(FIELD, PUBLIC), rule(FIELD, PROTECTED), rule(FIELD, PRIVATE)])
   }

java/java-tests/testSrc/com/intellij/psi/codeStyle/arrangement/JavaRearrangerByTypeTest.groovy

@@ -569,4 +569,85 @@ class B extends A {
       rules: [rule(PUBLIC, METHOD), rule(PRIVATE, METHOD)]
     )
   }
+
+  void "test initializer block after fields"() {
+    doTest(
+      initial: '''\
+public class NewOneClass {
+
+    {
+        a = 1;
+    }
+
+    int a;
+
+    {
+        b = 5;
+    }
+
+    int b;
+
+}
+''',
+      expected: '''\
+public class NewOneClass {
+
+    int a;
+    int b;
+
+    {
+        a = 1;
+    }
+
+    {
+        b = 5;
+    }
+
+}
+''',
+      rules: [rule(FIELD), rule(INIT_BLOCK)]
+    )
+  }
+
+  void "test static initializer block"() {
+    doTest(
+      initial: '''\
+public class NewOneClass {
+
+    static {
+        a = 1;
+    }
+
+    static int a;
+
+    {
+        b = 5;
+    }
+
+    int b;
+
+}
+''',
+      expected: '''\
+public class NewOneClass {
+
+    static int a;
+
+    static {
+        a = 1;
+    }
+
+    int b;
+
+    {
+        b = 5;
+    }
+
+}
+''',
+      rules: [rule(STATIC, FIELD), rule(STATIC, INIT_BLOCK), rule(FIELD), rule(INIT_BLOCK)]
+    )
+  }
+
+
 }

java/java-tests/testSrc/com/intellij/psi/formatter/java/JavaFormatterBlankLinesTest.java

@@ -25,6 +25,7 @@ public class JavaFormatterBlankLinesTest extends AbstractJavaFormatterTest {
 
   public void testBlankLinesAroundClassInitializationBlock() throws Exception {
     getSettings().BLANK_LINES_AROUND_METHOD = 3;
+    getJavaSettings().BLANK_LINES_AROUND_INITIALIZER = 3;
     doTextTest(
       "class T {\n" +
       "    private final DecimalFormat fmt = new DecimalFormat();\n" +