[IR] Dump IdSignatures and mangled names in irText tests

The reason #1 for this feature is that we want to test IdSignatures
generated for declarations. Currently, there is no (easy) way to ensure
that a change in the signature building logic doesn't cause any breaking
changes wrt klibs.

Now, most IdSignatures include hashed mangled names in them, so even if
we catch a regression where the included hash changes, there would be no
way of knowing immediately what caused it, unless we'd also have mangled
names in the expectations.

The reason #2 is to test the manglers themselves. Currently, there are
no tests for them. They heavily duplicate each other, this is already
causing issues (see KT-57427) that would be very hard to catch without
these tests.

^KT-58238 Fixed

compiler/testData/ir/irText/declarations/contextReceivers/arrayAccessOperators.sig.kt.txt

@@ -0,0 +1,65 @@
+// CHECK:
+//   Mangled name: MyContainer
+//   Public signature: /MyContainer|null[0]
+data class MyContainer {
+  // CHECK:
+  //   Mangled name: MyContainer{}s
+  //   Public signature: /MyContainer.s|7217541905509134881[0]
+  var s: String
+    // CHECK JVM_IR:
+    //   Mangled name: MyContainer#<get-s>(){}kotlin.String
+    //   Public signature: /MyContainer.s.<get-s>|4142379646177092803[0]
+    get
+    // CHECK:
+    //   Mangled name: MyContainer#<set-s>(kotlin.String){}
+    //   Public signature: /MyContainer.s.<set-s>|8225901422521337963[0]
+    set
+
+  // CHECK:
+  //   Mangled name: MyContainer#<init>(kotlin.String){}
+  //   Public signature: /MyContainer.<init>|1280618353163213788[0]
+  constructor(s: String) /* primary */
+  // CHECK JVM_IR:
+  //   Mangled name: MyContainer#component1(){}kotlin.String
+  //   Public signature: /MyContainer.component1|-7481405593404337796[0]
+  operator fun component1(): String
+
+  // CHECK JVM_IR:
+  //   Mangled name: MyContainer#copy(kotlin.String){}MyContainer
+  //   Public signature: /MyContainer.copy|-9194766205182052641[0]
+  fun copy(s: String): MyContainer
+
+  // CHECK JVM_IR:
+  //   Mangled name: MyContainer#equals(kotlin.Any?){}kotlin.Boolean
+  //   Public signature: /MyContainer.equals|722809408929142791[0]
+  override operator fun equals(other: Any?): Boolean
+
+  // CHECK JVM_IR:
+  //   Mangled name: MyContainer#hashCode(){}kotlin.Int
+  //   Public signature: /MyContainer.hashCode|-8048879360829830756[0]
+  override fun hashCode(): Int
+
+  // CHECK JVM_IR:
+  //   Mangled name: MyContainer#toString(){}kotlin.String
+  //   Public signature: /MyContainer.toString|6958853723545266802[0]
+  override fun toString(): String
+
+}
+
+// CHECK JVM_IR:
+//   Mangled name: #box(){}kotlin.String
+//   Public signature: /box|-9347091776561469[0]
+fun box(): String
+
+// CHECK JVM_IR:
+//   Mangled name computed from Ir:         #get@MyContainer(kotlin.Int;kotlin.Int){}kotlin.String?
+//   Mangled name computed from Descriptor: #get!kotlin.Int@MyContainer(kotlin.Int){}kotlin.String?
+//   Public signature: /get|-262764729710480185[0]
+operator fun MyContainer.get($context_receiver_0: Int, index: Int): String?
+
+// CHECK:
+//   Mangled name computed from Ir:         #set@MyContainer(kotlin.Int;kotlin.Int;kotlin.String){}
+//   Mangled name computed from Descriptor: #set!kotlin.Int@MyContainer(kotlin.Int;kotlin.String){}
+//   Public signature: /set|1694887052182048775[0]
+operator fun MyContainer.set($context_receiver_0: Int, index: Int, value: String): Unit
+