[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/constValInitializers.sig.kt.txt

@@ -0,0 +1,84 @@
+// CHECK:
+//   Mangled name: {}I0
+//   Public signature: /I0|3638397844945051376[0]
+const val I0: Int
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-I0>(){}kotlin.Int
+  //   Public signature: /I0.<get-I0>|-6746694356593193165[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-I0>(){}
+  //   Public signature: /I0.<get-I0>|7085170094336958136[0]
+  get
+
+// CHECK:
+//   Mangled name: {}I1
+//   Public signature: /I1|84494794639401383[0]
+const val I1: Int
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-I1>(){}kotlin.Int
+  //   Public signature: /I1.<get-I1>|-8819240179982204215[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-I1>(){}
+  //   Public signature: /I1.<get-I1>|1430672906566406691[0]
+  get
+
+// CHECK:
+//   Mangled name: {}I2
+//   Public signature: /I2|-5820322169900540552[0]
+const val I2: Int
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-I2>(){}kotlin.Int
+  //   Public signature: /I2.<get-I2>|-4989683773709385937[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-I2>(){}
+  //   Public signature: /I2.<get-I2>|-1160209788406877161[0]
+  get
+
+// CHECK:
+//   Mangled name: {}STR1
+//   Public signature: /STR1|-6743560849647323388[0]
+const val STR1: String
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-STR1>(){}kotlin.String
+  //   Public signature: /STR1.<get-STR1>|-2293085048547070941[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-STR1>(){}
+  //   Public signature: /STR1.<get-STR1>|5781950605000309766[0]
+  get
+
+// CHECK:
+//   Mangled name: {}STR2
+//   Public signature: /STR2|373630768127354084[0]
+const val STR2: String
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-STR2>(){}kotlin.String
+  //   Public signature: /STR2.<get-STR2>|1585456442054637269[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-STR2>(){}
+  //   Public signature: /STR2.<get-STR2>|8041479152331919578[0]
+  get
+
+// CHECK:
+//   Mangled name: {}STR3
+//   Public signature: /STR3|-2584825627971705247[0]
+const val STR3: String
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-STR3>(){}kotlin.String
+  //   Public signature: /STR3.<get-STR3>|-7307022761040876675[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-STR3>(){}
+  //   Public signature: /STR3.<get-STR3>|8574952695803340733[0]
+  get
+
+// CHECK:
+//   Mangled name: {}STR4
+//   Public signature: /STR4|-8283585211440994945[0]
+const val STR4: String
+  // CHECK JVM_IR:
+  //   Mangled name: #<get-STR4>(){}kotlin.String
+  //   Public signature: /STR4.<get-STR4>|-2113476242053901162[0]
+  // CHECK JS_IR NATIVE:
+  //   Mangled name: #<get-STR4>(){}
+  //   Public signature: /STR4.<get-STR4>|-7243567156065898284[0]
+  get
+