Add test on isNullOrEmpty-like contract

Currently, behavior is undesired, see KT-27241

compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/valueOfContractedFunctionIngored.kt

@@ -0,0 +1,11 @@
+// !LANGUAGE: +AllowContractsForCustomFunctions +UseReturnsEffect
+// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !DIAGNOSTICS: -INVISIBLE_REFERENCE -INVISIBLE_MEMBER
+
+import kotlin.contracts.*
+
+fun f3(value: String?) {
+    if (<!USELESS_IS_CHECK!>!value.isNullOrEmpty() is Boolean<!>) {
+        <!DEBUG_INFO_SMARTCAST!>value<!>.length
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/valueOfContractedFunctionIngored.txt

@@ -0,0 +1,4 @@
+package
+
+public fun myIf(/*0*/ cond: kotlin.Boolean): kotlin.Any
+public fun test(/*0*/ x: kotlin.Any?): kotlin.Unit

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithStdLibGenerated.java

@@ -1341,6 +1341,11 @@ public class DiagnosticsTestWithStdLibGenerated extends AbstractDiagnosticsTestW
                 runTest("compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/unreachableBranches.kt");
             }
 
+            @TestMetadata("valueOfContractedFunctionIngored.kt")
+            public void testValueOfContractedFunctionIngored() throws Exception {
+                runTest("compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/valueOfContractedFunctionIngored.kt");
+            }
+
             @TestMetadata("compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/multieffect")
             @TestDataPath("$PROJECT_ROOT")
             @RunWith(JUnit3RunnerWithInners.class)

compiler/tests/org/jetbrains/kotlin/checkers/javac/DiagnosticsTestWithStdLibUsingJavacGenerated.java

@@ -1341,6 +1341,11 @@ public class DiagnosticsTestWithStdLibUsingJavacGenerated extends AbstractDiagno
                 runTest("compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/unreachableBranches.kt");
             }
 
+            @TestMetadata("valueOfContractedFunctionIngored.kt")
+            public void testValueOfContractedFunctionIngored() throws Exception {
+                runTest("compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/valueOfContractedFunctionIngored.kt");
+            }
+
             @TestMetadata("compiler/testData/diagnostics/testsWithStdLib/contracts/smartcasts/multieffect")
             @TestDataPath("$PROJECT_ROOT")
             @RunWith(JUnit3RunnerWithInners.class)