[FIR] Forbid complex boolean expressions

Disabling the language feature is supported,
otherwise there are too many tests that
would need to be updated to account for
K2's inability to do it.

The `ifConstVal.kt` test is deleted,
because now it must also be ignored in K2,
and since it is ignored for both the
frontends, and the ignored backends
include all the target backends, this test
is basically unused.

Note that now both the frontends report
`CONST_VAL_WITH_NON_CONST_INITIALIZER`.
for `condition`.

^KT-55196 Fixed

native/native.tests/tests-gen/org/jetbrains/kotlin/konan/blackboxtest/FirNativeCodegenBoxTestGenerated.java

@@ -24235,12 +24235,6 @@ public class FirNativeCodegenBoxTestGenerated extends AbstractNativeCodegenBoxTe
                     runTest("compiler/testData/codegen/box/involvesIrInterpreter/intrinsicConst/equals_after.kt");
                 }
 
-                @Test
-                @TestMetadata("ifConstVal.kt")
-                public void testIfConstVal() throws Exception {
-                    runTest("compiler/testData/codegen/box/involvesIrInterpreter/intrinsicConst/ifConstVal.kt");
-                }
-
                 @Test
                 @TestMetadata("kCallableName.kt")
                 public void testKCallableName() throws Exception {

native/native.tests/tests-gen/org/jetbrains/kotlin/konan/blackboxtest/FirNativeCodegenBoxTestNoPLGenerated.java

@@ -24711,12 +24711,6 @@ public class FirNativeCodegenBoxTestNoPLGenerated extends AbstractNativeCodegenB
                     runTest("compiler/testData/codegen/box/involvesIrInterpreter/intrinsicConst/equals_after.kt");
                 }
 
-                @Test
-                @TestMetadata("ifConstVal.kt")
-                public void testIfConstVal() throws Exception {
-                    runTest("compiler/testData/codegen/box/involvesIrInterpreter/intrinsicConst/ifConstVal.kt");
-                }
-
                 @Test
                 @TestMetadata("kCallableName.kt")
                 public void testKCallableName() throws Exception {

native/native.tests/tests-gen/org/jetbrains/kotlin/konan/blackboxtest/NativeCodegenBoxTestGenerated.java

@@ -23998,12 +23998,6 @@ public class NativeCodegenBoxTestGenerated extends AbstractNativeCodegenBoxTest
                     runTest("compiler/testData/codegen/box/involvesIrInterpreter/intrinsicConst/equals_after.kt");
                 }
 
-                @Test
-                @TestMetadata("ifConstVal.kt")
-                public void testIfConstVal() throws Exception {
-                    runTest("compiler/testData/codegen/box/involvesIrInterpreter/intrinsicConst/ifConstVal.kt");
-                }
-
                 @Test
                 @TestMetadata("kCallableName.kt")
                 public void testKCallableName() throws Exception {

native/native.tests/tests-gen/org/jetbrains/kotlin/konan/blackboxtest/NativeCodegenBoxTestNoPLGenerated.java

@@ -24236,12 +24236,6 @@ public class NativeCodegenBoxTestNoPLGenerated extends AbstractNativeCodegenBoxT
                     runTest("compiler/testData/codegen/box/involvesIrInterpreter/intrinsicConst/equals_after.kt");
                 }
 
-                @Test
-                @TestMetadata("ifConstVal.kt")
-                public void testIfConstVal() throws Exception {
-                    runTest("compiler/testData/codegen/box/involvesIrInterpreter/intrinsicConst/ifConstVal.kt");
-                }
-
                 @Test
                 @TestMetadata("kCallableName.kt")
                 public void testKCallableName() throws Exception {