Escape special names with backticks in test data

#KT-51248

compiler/testData/loadJava/compiledKotlin/prop/nonConstValWithConstantValueAttribute.txt

@@ -1,17 +1,17 @@
 package test
 
 public val nonConstVal1: kotlin.Int = 1
-    public fun <get-nonConstVal1>(): kotlin.Int
+    public fun `<get-nonConstVal1>`(): kotlin.Int
 
 public final class C {
     /*primary*/ public constructor C()
     public final val nonConstVal2: kotlin.Int = 2
-        public final fun <get-nonConstVal2>(): kotlin.Int
+        public final fun `<get-nonConstVal2>`(): kotlin.Int
 
     public companion object Companion {
         /*primary*/ private constructor Companion()
         public final val nonConstVal3: kotlin.Int = 3
-            public final fun <get-nonConstVal3>(): kotlin.Int
+            public final fun `<get-nonConstVal3>`(): kotlin.Int
     }
 }
 
@@ -20,6 +20,6 @@ public interface I {
     public companion object Companion {
         /*primary*/ private constructor Companion()
         public final val nonConstVal4: kotlin.Int = 4
-            public final fun <get-nonConstVal4>(): kotlin.Int
+            public final fun `<get-nonConstVal4>`(): kotlin.Int
     }
 }