[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/annotations/constructorsWithAnnotations.sig.kt.txt

@@ -0,0 +1,40 @@
+// CHECK:
+//   Mangled name: TestAnn
+//   Public signature: /TestAnn|null[0]
+open annotation class TestAnn : Annotation {
+  // CHECK:
+  //   Mangled name: TestAnn{}x
+  //   Public signature: /TestAnn.x|-8060530855978347579[0]
+  val x: Int
+    // CHECK JVM_IR:
+    //   Mangled name: TestAnn#<get-x>(){}kotlin.Int
+    //   Public signature: /TestAnn.x.<get-x>|4966956098150895696[0]
+    // CHECK JS_IR NATIVE:
+    //   Mangled name: TestAnn#<get-x>(){}
+    //   Public signature: /TestAnn.x.<get-x>|1482705010654679335[0]
+    get
+
+  // CHECK:
+  //   Mangled name: TestAnn#<init>(kotlin.Int){}
+  //   Public signature: /TestAnn.<init>|-5182794243525578284[0]
+  constructor(x: Int) /* primary */
+
+}
+
+// CHECK:
+//   Mangled name: TestClass
+//   Public signature: /TestClass|null[0]
+class TestClass {
+  // CHECK:
+  //   Mangled name: TestClass#<init>(){}
+  //   Public signature: /TestClass.<init>|-5645683436151566731[0]
+  @TestAnn(x = 1)
+  constructor() /* primary */
+  // CHECK:
+  //   Mangled name: TestClass#<init>(kotlin.Int){}
+  //   Public signature: /TestClass.<init>|-5182794243525578284[0]
+  @TestAnn(x = 2)
+  constructor(x: Int)
+
+}
+