[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/fromKEEP/compareTo.sig.kt.txt

@@ -0,0 +1,79 @@
+// CHECK:
+//   Mangled name: Pair
+//   Public signature: /Pair|null[0]
+data class Pair<A : Any?, B : Any?> {
+  // CHECK:
+  //   Mangled name: Pair{}first
+  //   Public signature: /Pair.first|1497393077339299626[0]
+  val first: A
+    // CHECK JVM_IR:
+    //   Mangled name: Pair#<get-first>(){}1:0
+    //   Public signature: /Pair.first.<get-first>|-2355525345180386541[0]
+    get
+
+  // CHECK:
+  //   Mangled name: Pair{}second
+  //   Public signature: /Pair.second|8934636033843101515[0]
+  val second: B
+    // CHECK JVM_IR:
+    //   Mangled name: Pair#<get-second>(){}1:1
+    //   Public signature: /Pair.second.<get-second>|-7108495346814383827[0]
+    get
+
+  // CHECK:
+  //   Mangled name: Pair#<init>(1:0;1:1){}
+  //   Public signature: /Pair.<init>|3086114026882374588[0]
+  constructor(first: A, second: B) /* primary */
+  // CHECK JVM_IR:
+  //   Mangled name: Pair#component1(){}1:0
+  //   Public signature: /Pair.component1|2393470133763651536[0]
+  operator fun component1(): A
+
+  // CHECK JVM_IR:
+  //   Mangled name: Pair#component2(){}1:1
+  //   Public signature: /Pair.component2|319033347667924570[0]
+  operator fun component2(): B
+
+  // CHECK JVM_IR:
+  //   Mangled name: Pair#copy(1:0;1:1){}Pair<1:0,1:1>
+  //   Public signature: /Pair.copy|7298985996422673194[0]
+  fun copy(first: A, second: B): Pair<A, B>
+
+  // CHECK JVM_IR:
+  //   Mangled name: Pair#equals(kotlin.Any?){}kotlin.Boolean
+  //   Public signature: /Pair.equals|722809408929142791[0]
+  override operator fun equals(other: Any?): Boolean
+
+  // CHECK JVM_IR:
+  //   Mangled name: Pair#hashCode(){}kotlin.Int
+  //   Public signature: /Pair.hashCode|-8048879360829830756[0]
+  override fun hashCode(): Int
+
+  // CHECK JVM_IR:
+  //   Mangled name: Pair#toString(){}kotlin.String
+  //   Public signature: /Pair.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:         #compareTo@0:0(java.util.Comparator<0:0>;0:0){0§<kotlin.Any?>}kotlin.Int
+//   Mangled name computed from Descriptor: #compareTo!java.util.Comparator<0:0>@0:0(0:0){0§<kotlin.Any?>}kotlin.Int
+//   Public signature: /compareTo|-4091974102091923679[0]
+infix operator fun <T : Any?> T.compareTo($context_receiver_0: Comparator<T>, other: T): Int
+
+// CHECK:
+//   Mangled name: @Pair<0:0,0:0>{0§<kotlin.Any?>}min
+//   Public signature: /min|6885845668930107919[0]
+val <T : Any?> Pair<T, T>.min: T
+  // CHECK JVM_IR:
+  //   Mangled name computed from Ir:         #<get-min>@Pair<0:0,0:0>(java.util.Comparator<0:0>){0§<kotlin.Any?>}0:0
+  //   Mangled name computed from Descriptor: #<get-min>!java.util.Comparator<0:0>@Pair<0:0,0:0>(){0§<kotlin.Any?>}0:0
+  //   Public signature: /min.<get-min>|6404877126791863503[0]
+  get($context_receiver_0: Comparator<T>): T
+