JVM IR: Use package visibility for $assertionsDisabled field

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/AssertionLowering.kt

@@ -29,6 +29,7 @@ import org.jetbrains.kotlin.ir.expressions.impl.IrCompositeImpl
 import org.jetbrains.kotlin.ir.types.getClass
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.ir.visitors.IrElementTransformer
+import org.jetbrains.kotlin.load.java.JavaVisibilities
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.util.OperatorNameConventions
 
@@ -140,6 +141,7 @@ fun IrClass.buildAssertionsDisabledField(backendContext: JvmBackendContext, topL
     buildField {
         name = Name.identifier(ASSERTIONS_DISABLED_FIELD_NAME)
         origin = JvmLoweredDeclarationOrigin.GENERATED_ASSERTION_ENABLED_FIELD
+        visibility = JavaVisibilities.PACKAGE_VISIBILITY
         type = backendContext.irBuiltIns.booleanType
         isFinal = true
         isStatic = true

compiler/testData/codegen/bytecodeText/assert/jvmNestedClass.kt

@@ -1,6 +1,5 @@
 // This test is ignored until KT-36794 is fixed.
 // IGNORE_BACKEND: JVM
-// IGNORE_BACKEND: JVM_IR
 // KOTLIN_CONFIGURATION_FLAGS: ASSERTIONS_MODE=jvm
 
 class Outer {