DFA: support partial streams and ::isInstance method reference

Fixes:
IDEA-182519 Support non-terminated Stream API chains in data flow
IDEA-182520 Support Xyz.class::isInstance in stream/optional chains

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/redundantInstanceOf/afterInstanceOf.java

@@ -0,0 +1,9 @@
+// "Replace with a null check" "true"
+class Test {
+  void test(String s) {
+    Object obj = s;
+    if(obj != null) {
+      System.out.println("always");
+    }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/redundantInstanceOf/afterInstanceOfStream.java

@@ -0,0 +1,10 @@
+// "Replace with a null check" "true"
+import java.util.Objects;
+import java.util.stream.Stream;
+
+class Test {
+  void test(Stream<String> s) {
+    s.filter(Objects::nonNull)
+      .forEach(System.out::println);
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/redundantInstanceOf/beforeInstanceOf.java

@@ -0,0 +1,9 @@
+// "Replace with a null check" "true"
+class Test {
+  void test(String s) {
+    Object obj = s;
+    if(obj instanceof <caret>String) {
+      System.out.println("always");
+    }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/redundantInstanceOf/beforeInstanceOfStream.java

@@ -0,0 +1,9 @@
+// "Replace with a null check" "true"
+import java.util.stream.Stream;
+
+class Test {
+  void test(Stream<String> s) {
+    s.filter(String.class::<caret>isInstance)
+      .forEach(System.out::println);
+  }
+}