Escape special names with backticks in test data

#KT-51248

compiler/testData/diagnostics/tests/subtyping/localClasses.txt

@@ -1,7 +1,7 @@
 package
 
 package p {
-    private fun foo(): p.foo.<anonymous>.A
-    private fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.A
+    private fun foo(): p.foo.`<anonymous>`.A
+    private fun foo(/*0*/ a: kotlin.Int): p.foo.`<anonymous>`.A
     public fun test(): kotlin.Unit
 }

compiler/testData/diagnostics/tests/subtyping/memberAnonymousObjects.txt

@@ -2,7 +2,7 @@ package
 
 public final class Test {
     public constructor Test()
-    private final var x: Test.x.<no name provided>
+    private final var x: Test.x.`<no name provided>`
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String

compiler/testData/diagnostics/tests/subtyping/nestedIntoLocalClasses.txt

@@ -1,7 +1,7 @@
 package
 
 package p {
-    private fun foo(): p.foo.<anonymous>.<no name provided>.A
-    private fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.<no name provided>.A
+    private fun foo(): p.foo.`<anonymous>`.`<no name provided>`.A
+    private fun foo(/*0*/ a: kotlin.Int): p.foo.`<anonymous>`.`<no name provided>`.A
     public fun test(): kotlin.Unit
 }

compiler/testData/diagnostics/tests/subtyping/nestedLocalClasses.txt

@@ -1,7 +1,7 @@
 package
 
 package p {
-    private fun foo(): p.foo.<anonymous>.A.B
-    private fun foo(/*0*/ a: kotlin.Int): p.foo.<anonymous>.A.B
+    private fun foo(): p.foo.`<anonymous>`.A.B
+    private fun foo(/*0*/ a: kotlin.Int): p.foo.`<anonymous>`.A.B
     public fun test(): kotlin.Unit
 }

compiler/testData/diagnostics/tests/subtyping/topLevelAnonymousObjects.txt

@@ -1,4 +1,4 @@
 package
 
-private var x: x.<no name provided>
+private var x: x.`<no name provided>`
 public fun test(): kotlin.Unit