[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/extensionProperties.sig.kt.txt

@@ -0,0 +1,67 @@
+// CHECK:
+//   Mangled name: Host
+//   Public signature: /Host|null[0]
+class Host {
+  // CHECK:
+  //   Mangled name: Host#<init>(){}
+  //   Public signature: /Host.<init>|-5645683436151566731[0]
+  constructor() /* primary */
+
+  // CHECK:
+  //   Mangled name: Host@kotlin.String{}test3
+  //   Public signature: /Host.test3|6611475030333167314[0]
+  val String.test3: Int
+    // CHECK JVM_IR:
+    //   Mangled name: Host#<get-test3>@kotlin.String(){}kotlin.Int
+    //   Public signature: /Host.test3.<get-test3>|-8733015989987681805[0]
+    // CHECK JS_IR NATIVE:
+    //   Mangled name: Host#<get-test3>@kotlin.String(){}
+    //   Public signature: /Host.test3.<get-test3>|8733981612854462725[0]
+    get(): Int
+
+  // CHECK:
+  //   Mangled name: Host@kotlin.String{}test4
+  //   Public signature: /Host.test4|7486468124994005123[0]
+  var String.test4: Int
+    // CHECK JVM_IR:
+    //   Mangled name: Host#<get-test4>@kotlin.String(){}kotlin.Int
+    //   Public signature: /Host.test4.<get-test4>|5807409276278007610[0]
+    // CHECK JS_IR NATIVE:
+    //   Mangled name: Host#<get-test4>@kotlin.String(){}
+    //   Public signature: /Host.test4.<get-test4>|-1587066497248455001[0]
+    get(): Int
+    // CHECK:
+    //   Mangled name: Host#<set-test4>@kotlin.String(kotlin.Int){}
+    //   Public signature: /Host.test4.<set-test4>|8811649911764795566[0]
+    set(value: Int): Unit
+
+}
+
+// CHECK:
+//   Mangled name: @kotlin.String{}test1
+//   Public signature: /test1|-338155035617859525[0]
+val String.test1: Int
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-test1>@kotlin.String(){}kotlin.Int
+  //   Public signature: /test1.<get-test1>|-5900273555540008657[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-test1>@kotlin.String(){}
+  //   Public signature: /test1.<get-test1>|-5601238586673262455[0]
+  get(): Int
+
+// CHECK:
+//   Mangled name: @kotlin.String{}test2
+//   Public signature: /test2|298349501950551030[0]
+var String.test2: Int
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-test2>@kotlin.String(){}kotlin.Int
+  //   Public signature: /test2.<get-test2>|3412895218642147211[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-test2>@kotlin.String(){}
+  //   Public signature: /test2.<get-test2>|1426339134726014217[0]
+  get(): Int
+  // CHECK:
+  //   Mangled name: #<set-test2>@kotlin.String(kotlin.Int){}
+  //   Public signature: /test2.<set-test2>|3674864148848971521[0]
+  set(value: Int): Unit
+