Minor, rename test and avoid commented directive

Get rid of "_lv12" in the test name, since it's actually a test on the
modern compiler. Also, avoid the commented "IGNORE_BACKEND: JVM_IR"
directive in another test to make JVM IR test failures more greppable.

compiler/testData/codegen/box/platformTypes/primitives/equalsNull_withExplicitFlag.kt

@@ -4,7 +4,7 @@
 // WITH_RUNTIME
 // FILE: equalsNull_withExplicitFlag.kt
 
-// Should be: IGNORE_BACKEND: JVM_IR
+// Should be ignored on JVM IR.
 // ^ TODO: fix intrinsic for 'equals' for boxed primitives
 // JVM_IR supports behavior since Kotlin 1.3,
 // and '-Xno-exception-on-explicit-equals-for-boxed-null' is a fallback flag introduced in 1.2.

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -18238,9 +18238,9 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/platformTypes/primitives/equals.kt");
             }
 
-            @TestMetadata("equalsNull_lv12.kt")
-            public void testEqualsNull_lv12() throws Exception {
-                runTest("compiler/testData/codegen/box/platformTypes/primitives/equalsNull_lv12.kt");
+            @TestMetadata("equalsNull.kt")
+            public void testEqualsNull() throws Exception {
+                runTest("compiler/testData/codegen/box/platformTypes/primitives/equalsNull.kt");
             }
 
             @TestMetadata("equalsNull_withExplicitFlag.kt")

compiler/tests/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -18238,9 +18238,9 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/platformTypes/primitives/equals.kt");
             }
 
-            @TestMetadata("equalsNull_lv12.kt")
-            public void testEqualsNull_lv12() throws Exception {
-                runTest("compiler/testData/codegen/box/platformTypes/primitives/equalsNull_lv12.kt");
+            @TestMetadata("equalsNull.kt")
+            public void testEqualsNull() throws Exception {
+                runTest("compiler/testData/codegen/box/platformTypes/primitives/equalsNull.kt");
             }
 
             @TestMetadata("equalsNull_withExplicitFlag.kt")

compiler/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java

@@ -16722,9 +16722,9 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/platformTypes/primitives/equals.kt");
             }
 
-            @TestMetadata("equalsNull_lv12.kt")
-            public void testEqualsNull_lv12() throws Exception {
-                runTest("compiler/testData/codegen/box/platformTypes/primitives/equalsNull_lv12.kt");
+            @TestMetadata("equalsNull.kt")
+            public void testEqualsNull() throws Exception {
+                runTest("compiler/testData/codegen/box/platformTypes/primitives/equalsNull.kt");
             }
 
             @TestMetadata("equalsNull_withExplicitFlag.kt")

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -16722,9 +16722,9 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/platformTypes/primitives/equals.kt");
             }
 
-            @TestMetadata("equalsNull_lv12.kt")
-            public void testEqualsNull_lv12() throws Exception {
-                runTest("compiler/testData/codegen/box/platformTypes/primitives/equalsNull_lv12.kt");
+            @TestMetadata("equalsNull.kt")
+            public void testEqualsNull() throws Exception {
+                runTest("compiler/testData/codegen/box/platformTypes/primitives/equalsNull.kt");
             }
 
             @TestMetadata("equalsNull_withExplicitFlag.kt")